There is a 3 way connector (X27) on the outer firewall ahead of the master brake cylinder. It has a heavy violet/white (2,5mm sq) wire that is the trigger for the starter. Check that you have voltage there when you crank. If you do then that eliminates the ignition switch and park neutral switch.
The harness from that connector down to the starter (and oil pressure and oil level sensor) disintegrates like the main engine harness and could be the problem.

If you have no voltage at pin 2 of X27 then you may have bad shifter rod bushings, park neutral switch or ignition switch.