*Need help on how to wire up a switch panel*

67Dart273 gave you great info.

I just rewired my 65's engine and dash harnesses, so can add some mostly correct answers.

The black wire to the ignition switch is the "accessory feed output". You don't need that if you are supplying accessory power elsewhere with a switch.

If you have a strong electronic ignition, like MSD, I don't know that you require the brown wire to the ballast resistor. I didn't bother to wire it thru my bulkhead since I plan eventually to eliminate the ballast w/ HEI or LS1 coils (Crane XR700 currently). That wire bypasses the ballast resistor, feeding +12V direct to the coil+ (downstream side of ballast) only when the starter is cranking. That is why you can get it from the 87 Jeep starter relay. That was effectively what you were doing by connecting your brown and yellow wires together. I always wondered why Mopar didn't just wire the brown to the starter relay output. Maybe because the starter coil can give a kickback voltage that might hurt the ignition system. The Jeep's relay probably uses separate contacts for that.