I'm trying to figure out ignition switch wire connection on 1974 914-4 2l. Somebody took it apart to remove steering lock. Hanging wires are thick red wire (+), black and red (-), yellow (starter), red wire, grey are not disconnected. Pins on the switch are labelled 30, 50, 15, X. Can somebody tell me which wire goes where? Click to view attachment

there is a socket/plug also for those wires like the one on the right but a little bigger.