I disconnected my hot tub power today as we prepare to dispose of it. The wiring (6 AWG, on a 50 amp breaker) goes through underground conduit underneath a walkway, so while I figure out what to do with the wiring, I wanted to cap it somehow to both prevent water from getting inside the conduit and also perhaps using it for outdoor receptacles or lighting in the future (who knows).
Short term, I wire capped it and wrapped it in electrical tape until the hot tub is disposed of and I have better access to everything, but I'm looking for something safe and semi-permanent. I think I'm looking for something like this: https://www.amazon.com/MAKERELE-Plastic-Waterproof-Adjustable-Protectors/dp/B094ZF2Z3T/ but the problem is that I don't know if that's a cap or not because there are no images of the other side.
What is the best way to handle this? I have the romex connector still and was thinking there is something I can screw on top as a more permanent cap, but I walked around Lowes and didn't see anything that seemed like what I was looking for.
Current wiring (after capping, before wrapping the conduit hole in electrical tape as well): https://ibb.co/ph8kZ5Q