The Gang of Four supplies power to the entire car, EXCEPT the starter and alternator:
- Ignition switch, circuit 30
- S11 as described above
- S13 fuse (on relay plate), power to heater J14 blower relay
- J16 power supply relay
I'd suggest installing a resettable circuit breaker in a convenient place bisecting the wire from the battery to the Gang; 100A oughtta be enough to protect that circuit (4xAWG6 is roughly 200A total but I simply cannot imagine the whole normally-equipped car - minus starter and generator - draws more than 100A).
I've not seen a stock car - my two cars were already altered and batteries re-located - so I can't suggest where that location might be...I installed fuses/breakers in both.
https://www.amazon.com/gp/product/B06Y4ZQ5SCThat still leaves the big B-lead between battery and starter and alternator unfused, so, well, keep your fingers crossed.