I used a project enclosure from radio shack to house my 4 switches and 4 relays, it mounts nice on the dash above the speedo, its held down with 2 bolts through the dash and I have a 14ga 7 conductor wire that runs through the dash to a marine fusebox that I mounted in the same enclosure under the hood ontop of the fan shroud. The boxes are $8 at radio shack and come in 10 different sizes, they also seal well I hit both of mine for about 5 minute's with my pressure washer and the inside was totally dry.
