I got guy out from company who supplied the motor and he said there was a spring missing from the port which had valve saying tv-8.. who knows, working now for a fee plus millage.
No need to get too technical on this, ip44 would be a must for me. And if you relating back to the early 90s where they aresimilar to social housing back door lights etc, well times have changed.
If he doesn't say anything, the next spark will.
Like you say wooden batters fixed with adesive, squirt silicone into screws holes, plastic back boxes as these be sealed apart from what ya break....
I'd be more worried about your fixings than their damp/wall ----ers.
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