There are a couple of problematic connections in my battery layout. Particularly, the connection between A4 and A5 in
this diagram is tricky. I tried making a traditional cable, but the 4/0 cable I'm using does not flex enough. So, I improvised. Looking up the specs on welding cable, I found that three 2 gauge cables are nearly identical to one 4/0 gauge cable, both in circular area as well as specified ampacity. So, I cut and stripped three lengths of 2-gauge cable (here shown next to 4/0 gauge lugs):
![](http://2.bp.blogspot.com/_m91aiCJDbnU/SUddSkjW71I/AAAAAAAAB54/dQ5Af9ori_o/s320/01_ThreePieces.jpg)
I firmly taped the three together, then fit 4/0 lugs onto them...
![](http://4.bp.blogspot.com/_m91aiCJDbnU/SUddSmmcnVI/AAAAAAAAB5w/VcwVrylzsQY/s320/02_TapedFit.jpg)
...then crimped the snot out of them (after all, who wants snotty cables?):
![](http://1.bp.blogspot.com/_m91aiCJDbnU/SUddNMifVvI/AAAAAAAAB5o/MgEhgNi9-fg/s320/03_Crimping.jpg)
Here is the crimped flexi-cable:
![](http://1.bp.blogspot.com/_m91aiCJDbnU/SUddNFGzW2I/AAAAAAAAB5g/w0XGWx986Ps/s320/04_Crimped.jpg)
And here is me flexing it one-handed. I could not come close to flexing the 4/0 gauge cable like this:
![](http://1.bp.blogspot.com/_m91aiCJDbnU/SUddM5HYYeI/AAAAAAAAB5Y/H2vwUwmWLak/s320/05_Bendy.jpg)
I double-heat-shrink-wrapped the ends:
![](http://3.bp.blogspot.com/_m91aiCJDbnU/SUddMrx3oYI/AAAAAAAAB5Q/tOXsM5M3aAU/s320/06_Finished.jpg)
And here it is, snug in its location:
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