This lead replaces the original Headset lead which is hardwired into the Autocom unit. 

The lead can be easily replaced using a Phillips-head screw driver.

Normally the two screws are located on the back of the Autocom unit, or on some models underneath the unit's label. (Gently punch through the sticker to access the screws)

The lead has a white JST connector. The damaged lead's JST connector should be gently removed, and the replacement lead attached.

The Autocom unit can then be reassembled, taking note to route the leads out of the appropriate holes.