Review on Heavy Duty 8-Foot 7 Way Plug Inline Trailer Cord With Weatherproof Junction Box - Leisure Cords by Profit Gilley

This would beva 5 star review of it came with instructions. I get that the manufacturer probably thinks this is a self explanatory piece of equipment, but after spending 3 days banging my head against a wall only to find out 4 pin and 7 pin trailers use different color wires for lights, it would have been better if that was called out on install instructions.