The back of the Hoseguide has 2 TX10 screws that need to be removed.

The cover can the be unclipped starting from the tab at the bottom.

note the location of the ferrule around the white, yellow and black wire. It had to be all the way at the bottom for my cover to go back on.

I cut the wires below the ferrule and soldered new wires to the section going thru the hinge, your unit should have black white and yellow running all the way thru to the head.