Another Water to the inside

Doing some routine maintenance, pulled the wall in the basement to check for leaks.  Many of us have this water control panel, it's a large plastic box.

When I got it out here's what I found, the white is mineral from water that was under the plastic box.  I normally have an electric cord real next to this and had not seen the tell tales sign

Here is where the water gets in, you recognize the circle where the water hose exits.  The line down the center is where the "box" is mounted to the bottom edge of the basement door.  The crack between the box & camper are not sealed so water draining from disconnecting water hose & black tank flush, etc travels down the crack and under the plastic box. That crack needs sealed.