Bracket Car Wiring Help

crackedback said
Pretty simple figure out if you want the starter battery cable hot all the time or not.

If you want it cold when not starting and depending on amp load, run a 2-6ga single cable forward from the cutoff switch feeding the fusebox/switch box... DONE! Branch anything else off the fusebox or buss point up front. No alternator makes it simple.

I hook MSD's up all the time on a buss point that has a well sized feed cable. Never an issue.

If that switch box has relays in it, great. If not, I'd set up a relay gang to run all those components and keep the load away from the toggles.

I assumed the starter battery cable would be hot all the time that the master cutoff switch is on unless that’s not a good way to do it.

So I was thinking starter hot to this 100amp MIDI setup that came with the painless kit and then the other side to both the relay box and the MSD box?

Most circuits are relayed as noted in the attachment above but not all. Here is the relay layout and the supplied fuse.