Leaking hitch light?

[Topglock]

So after our rather rainy memorial weekend camping trip I happened to notice a small drip coming from the wire loom beneath the hitch light. Upon noticing the drip I looked at the light and it had standing water in it. I resealed the light housing after we got it out of storage but not the lens. Ended up cutting the black mesh water guard to see how wet it really was. I put a fan on it all day and seems to be all dried as far as I can see.

So my question is do you think this could be the source of the leak? I can’t locate a wiring diagram to see if there connected. I put a bead of silicone around the lens and were supposed to get some heavy rain tonight.