Follow the wires back from the fuel pump. Could be a fuse or a relay. If those are hard to get to I use a jumper from the battery positive to the fuel pump positive just to see if you can get the fuel pump to kick on.
If you’re going to use the spod to turn on a bus bar you need to make sure whatever you have connected to that bus bar doesn’t exceed the current rating of the switch port you’re gonna use. Or use the spod ignition on to trigger a relay that then can handle the current.
You would use the same ground that triggers the relay to trigger the msd box. Think of the msd box as the relay.
For the lights. You can attach whatever you want to one “port” as long as you don’t exceed the amp rating of said port. So if it’s rated at 25amps you could 4 lights of it.
I had a mobile guy come out and do the test 2 Mondays ago. My results still have posted to Carb. How long was that taking for anyone else? I’m at 9 days so far.