Generator front cover on a motorhome

I just had a similar issue last week while coming home I noticed my LH headlight wavering back and forth, the screws were lose in the rotted wood, tried a temporary fix on the road but it did not hold. When I got home I removed the rotted wood with an Allen wrench and installed new wood sections that would fit into the elongated hole in the FG that covered the wood, then added epoxy to hold the wood in place. The screws hold securely now. On your cover if you can access the rotted area you can always remove the FG overlay and rotted wood and place new wood there and in cover it with FG and epoxy. The wood and screws take all the load the FG just holds the wood in place.