[pierremcalpine]

Originally Posted by KBB

Another quick workshop trick is to connect a battery or power pack directly to the EPB connector and allow it electrically to unwind, takes only a few seconds. Simply reverse the connection after pad change for winding back into park position.

I'm curious about this option:
A) how do you figure out which side to connect to (+) and which side to connect to (-) for unwinding vs winding
B) is is really necessary to wind back up at the end or will this happen anyway the next time you activate it normally?