Fuel pump relay location

So, if I wire the switched wire from the relay, to the inertia switch, to the kill switch, to oil pressure switch, to fused source, isn't that a lot to ask of the one wire? I bought a 30 amp switch, and the circuit breaker from battery is 30 amps.can I wire the switch into the battery wire?

I would wire all the "controls" into the trigger wire. "Too much?" Not if done properly.

Let's look at "one wire" in the factory setup.............your left rear turn bulb. "What all" is in that train?

Battery......starter relay.......bulkhead connector.........ammeter.........ignition switch........fuse panel (through the fuse)........to the turn signal flasher...........to the turn signal switch........to the left kick panel connector.........."all the way" to the rear.......to the left rear turn bulb.

This, really, is no different. You need each wire and each connection to be dependable and reliable. You need the wire dressed / tied up "safe" away from mechanical / heat etc damage.

I may or may not put an oil pressure switch in mind, but I certainly am installing a "crash" switch. And, LOL, I may change my mind on the oil switch.