Prior to finally fixing the Upper Gap Seal in place now that the antennae were installed I checked that the navigation, landing, and strobe lights on the wings were still working. There are a couple of Molex electrical connectors between the wings and behind the gap seal that needed tending to. A couple of the wires had slipped out during all the kafuffles with the wings since the lights had last been checked as working on 9 June 2021. All lights were working again!