Since CJ Dave is absent I will post his response to this, one of his favorite subjects .....
A note about wiring from a fellow Jeeper named CJ-Dave ...
I have had a few Jeepers ask about grounding since I posted to the Jeep gal who is sending the battery to the rear area, so here is some continuing info on that subject:
......Remember that you are actually driving three separate Jeeps around: the FRAME; the ENGINE/TRANNY GROUP; and the BODY. The three groups are separated by insulating bushings, rust (lots of that), grease, and just plain looseness.
When your Jeep was new and rust free, the factory thought enough about grounds to have little cables here and there going from the battery to these component groups, but when you and cousin Leroy jerked the engine in '89, you broke the cables and they never got put back.
Do your Jeep a favor, and run dedicated cables to EACH COMPONENT GROUP.
Go from the battery to the starter housing bolt for the ENGINE/TRANNY group; from the battery (or the engine) to the FRAME GROUP; and from the battery (or the engine) to the BODY GROUP.
Work hard to get good clean spots; ground the tub and front end body material separately; be diligent about this, and you will be AMAZED at what a difference it will make (gee, the gas gauge started working'!), and maybe now that measly twelve volts can actually find it's way to the headlights!
Also, I like the idea of an alternator to tub to battery ground wire.....