The sliding glass is fed power by a couple of wires that come up from the bottom on the left side. There's a cover on the lower left corner of the window over the connection point. The cover should snap off, giving you access to the connections.
Kevin
There are several options for adhesive.Yep...that's the issue. The top connection point has worked itself off :-( I think there is some adhesive meant specifically for that problem. Not a huge deal, but annoying!