I was running the flail mower over brush when the PTO disengaged and would not re-engage. I found that a branch had gone up behind the rear axle pulling a two pin wire connector out (see picture). I was able to put the two wire leads back into the tractor socket (without the mating socket, wires pulled out of it) but still no PTO. All the fuses are good, so I am thinking maybe there is more wiring harness damage as a few rear wire harnesses leads go up under the seat. Any advise on how to trouble shoot this?