Either way would work, but removing both wires and connecting them with a short jumper wire would probably be the best choice. One of the wires should have constant battery voltage, and the other should complete the circuit back to the brake lights. If neither wire has voltage, start looking for a blown fuse upstream of the brake light switch.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!