We decided to start the build process with the power control box. Each of the boards are mounted in place using 4-40 countersink screws with a small washer, nylon spacer, and nut (all of which were purchased at Lowes). Using a countersink drill bit allows for the face of the box to remain flat, and that will be essential when a graphic is applied to it later on. I didn't use any fancy method for measuring the best position to place the boards. I simply put them where I thought it would be best and marked the hole positions prior to drilling. The relay board is slightly off center to allow for additional cables. I then removed all of the old cables from the surge protector circuit and soldered new ones to accommodate the required lengths. The on/off switch had to be taken off the board to be moved to another location in the box.