no wires... esc, motor mount/heatsink

What happened to me was that a truck pulled into the area where we usually run cars. And I hit the tire doing over 45. The impact stripped the mounting screw holes out of the motor and it moved. Had it been soldered directly to the esc, it would almost certainly have ripped the pcb apart on the esc. On the other hand, it seems that this sort of stuff only happens to me. LOL