Polar Power Unit wire torn out ... home repair?

Just packing the bike for a race and noticed my local bike shop tore the wire out of the rear deraileur power sensor on my Polar Power unit when doing the tuneup. Anyone fixed one of these before? Any tips?

lol, I didn’t read the damn message…

Here is a tip though… If you get the power sensor, unscrew the little cap that is the connector to the watch mount (It can be taken apart) and put hot glue or some silicone inside to help hold it all together.