Engine bay: what isn't needed?

alright so the image i spent 20 minutes setting up in photoshop is horrendously too big to post on here.....and its in a photoshop format and if i downsize it to post, its way way to small.....its been 7 years since ive messed with this crap :banghead: so heres the original pic i modded....without mods grrrrr.....itll get you going in the right direction for wiring anyway.