I use one of these (pictured below) already, to provide B+ to the relays (horn, main beam, low beam, driving lamps, fog lamps, AFR meter, and the aux. fuse box).  This receives B+ current via a 25 sq. meter (170A, lead, yes, slightly larger than needed) currently situated on the starter solenoid.

What I wanted was a post where I could mount another 'B+' take-off, in order to move the above mentioned 170A lead, and attach a 10 mm sq. 70A lead for the aux. fuse box relay to increase capacity from the present 40A to 70A (or maybe only to 60A, I've got both 60A and 70A mega fuses - haven't decided which to plug in).

  (from Vehicle Wiring Products, rated at 120A, currently has radio, horn, main, low, driving, fog and AFR and 40A aux. fuse box B+ connections)

This new 'post' will receive a short 40 mm sq. 240A jumper lead from the starter solenoid B+ post, provide B+ to the junction box & aux. fuse box 70A relay, and possibly also receive the 70A alternator 'output' to B+ - should I decide to fit the alternator.

The starter solenoid post doesn't have space for any additional leads (it's a tight fit at 4 ring terminals) and I can't make the post longer; thus the want for an extra ordinary B+ post.  I realize that the likelyhood of everything being 'live' simultaneously is unlikely, and I'll not have 70A or even 50A active on the aux. fuse box at any given time, but I'd like the capability to be there.

I like that one Terry especially the cover to protect it some from the elements and the odd wrench shorting out on it.

John just to let you know that we have other sources for these items like JEGS

and I always think of you when I order from them...

YUP...elegant too!

Wait a minute.....did a problem just get solved without outside interference?

Cool - why I didn't think of that!  I've got several on hand, so this'll be quite simple to execute.

Thank you very much -

That is fine. Personally, I would go with a regular mini exhaust bobbin. GEX7251. 

Mur, I need more B+ posts for another electrical upgrade, so if you don't mind, I need your opinion.  

The big relay project we did earlier incorporated a small 120A rated B+ junction station/box which distributes the B+ feed to the relays.  I'm now contemplating installing a 70A relay for the supplemental fuse box instead of the 40A, and although there's no chance I'll ever have everything powered up at the same time, I'd like to dimension the electrical system to accomodate the worst case scenario.  

With that in mind, I've currently used the B+ post on the starter solenoid as my B+ source, which also receives current from the alternator.  The starter solenoid B+ post is only so long, and with the lead to the B+ junction box only rated at 110A (can be upgraded) currently carrying the load to both headlight relays, both driving and fog lamp relays, AFR and horn relays, it won't take the full current increase to 60A or 70A for the supplemental fuse box expansion.

I'm considering, therefore, installing one of these onto the front subframe rail via a 170A lead from the B+ starter solenoid post to provide current to the 70A relay (which I'll limit the fuse box via a 60A fuse, and of course, use a 3A trigger fuse).  My plan is to also move the red (110A) junction box lead to this post, which will free a place on the starter solenoid post for an alternator upgrade.

 (BB151R, rated at 150A max.)


What do you think?

Edit:  It looks better 'live' than in the photo, but you get the idea...