How can I make this fuse/relay box water resistant?

[CafeRoaster]

Took a gamble on a cheap fuse/relay box and switch panel. So far it's been great, but I can't close the fuse/relay box lid, because they don't account for the battery cables. Hah!

What could be the best way to go about making this more water resistant?

I'm thinking I could use a large drill bit to carve out a space for the cables, then find or make a gasket that goes around the top lid and bottom.

 

[MidOH]

Who says it has to? Hog out holes for the cables. Close it up.

If you keep the holes small, grease could seal it up enough.

 

[bgenlvtex]

Yeah, cut a relief for cable entry using your choice of tools, then Sikaflex or similar to seal.

 

[Akicita]

. . . and coat all connections and contacts with dielectric grease. . . I like CRC Marine Premium.