Get you battery's mounted
Isolator installed
Pick a spot for the PDM60
View attachment 46480
View attachment 46481
Get all your accessories mounted.
Cut the switch plate hole out.
Pick the circuits on the PDM60, remembering that there are rules for each.
Use the amp draws for the accessories to plan how you're going to land them to the PDM.
Once you have all that in place, and have decided what the switches are going to do for you start running the wires from the accessories to the switch panel leaving an extra 18" or so to give you room to the land them to the switches.
PM me I've got pretty much that setup I'll be glad to help you anyway I can.