Coachman Catalina outdoor speakers
I have a 2014 Coachman Catalina (303 BKHS I believe) and have a question about repairing my outdoor speakers. I brought the trailer home to wash the roof and trailer before it became to cold. While washing the trailer I was rinsing the side with the outdoor speakers and I noticed something shiny move just under the speaker cover. The shiny thing was the center part of the speaker you see when you look at it. The speakers still worked aside from this issue.
So, aside from one speaker not working (not due to this issue), I removed the speaker and all of the screws to try and reattach the silver part of the speaker. To no avail, it appears the speaker face was glued to the actual speaker itself. So, I did the best I could to reattach the silver part before taking the trailer back to the storage yard.
Does anyone know how to go about reattaching the silver part of the speaker and might any water get behind the speaker if this is not reattached. Also, can anyone give some suggestions on diagnosing why only one speaker works? I would presume the fuse is okay since one of the two speakers works.
I have attached pictures I took of the speaker so you will understand what I am hoping to describe.
Any help is appreciated.