bloody hell! that can't help!
what the hell has burnt that connector? the switch matrix is a low current 12v circuit - looks like something bad has happened in the past like a short or something under the playfield.
Cheers
Jacob
That pic is of the GI connectors. I can see that the smaller gauge brown wire has been reconnected from the upper molex(idc) connector to the lower. Will still work as these are parallel. I would change the plug and header pins and reconnect the wire to J120( just to keep it factory)
Oh yeah, J120 - should have looked closer. Seems to be par for the course that almost every J120 needs replacing... I know I had to on BR and IJ...
Cheers
Jacob