into that plywood shared wood wall between the lazarette and the cabin. They hold very well and there is nothing visible in the cabin. Is that lazarette dry enough for electronics?

I have a Heart 2000, about 70 lbs, mounted in my engine space with twelve no. 12 sheet metal screws into a plywood bulkhead. I mounted it there in 1994. it has never moved. The P.O. had it mounted in the lazarette and I never trusted it to be dry.