see back probing.This is for testing volt.Their are 3 reasons to back probe.

1.it will not damage the male pin by spreading it open(If you probe the front of a male pin)

2.Its temporary(you don't have to cut any wires)

3.You can test a live circuit(If you unplug a connector the circuit it will no longer work)

Now make shure you have a good connection at the jump wire to the safety pins and safety pins to the connector hit the brake and see if you can get out of park.Try not to let the safety pins touch ground(Not a big deal you would just blow fuse 25).