Since it doesn’t look like a phenomenal install, I’d say it woul be easy to trace, there’s a harness of thicker wires coming out of the steering column under the dash. Look for those then look for any that “T” probably taped (someone will have to verify but I think it’s either pink or orange for the starter wire. Those other relays look to be door lock and unlock they will just be spliced into wires Probabaly around the drivers kick panel area. Could be scotchlocked. It w shouldn’t hurt anything leaving it all in just keep in mind that it’s there if later on down the line you have starting or door lock issues.