Heated rear screen - loose connection

Hey guys

Just a little one, my heated rear screen wasn't working, I managed to narrow it down to the pair of connectors on the right hand side being loose - jiggled them around and they sparked a bit, and the element started working. All good, except it'll probably stop working again. The connection is a real pain to get to as it's hidden inside the tailgate structure (no idea what it's called). Do you reckon I could just drop a few blobs of solder in there to sort it out, or is there an easier way to get to it?