For the Electric Trailer Brake Kit - Self-Adjusting - 10" item # AKEBRK-35-SA, the brake magnet wires are interchangeable. As long as one goes to power and one goes to ground they will work. view full answer...
For your 2014 Forest River 425D Flagstaff Classic Super Lite Camper I recommend the Classic Accessories Deluxe PolyPro III Heavy-Duty Pop-Up Camper Cover - 18' - 20' Long Item # CA80043. This camper cover features triple-ply, weatherproof fabric to keep out rain and snow and wicking technology to eliminate moisture buildup - perfect for wet climates. It has an extra foot of space to accommodate the spare tire cover and the covers are manufactured with AC units in mind so you won't have... view full answer...
The rails you mentioned are called industry-standard, above-bed base rails, and most hitches that fit on above-bed rails will fit these. The list is massive and there are so many applications it is not especially feasible to list them all, but some popular examples are the Curt A20 5th Wheel Trailer Hitch # C16140 and B&W Patriot 5th Wheel Trailer Hitch # BWRVK3255.
If you let me know the year, make, model and bed size of your truck I would be happy to recommend the best option for base... view full answer...