20 Protection of any add-on wiring is just as important as the connection of the wiring. Having individual wires routed everywhere and secured with a tie wrap or two doesn’t cut it. All accessory wiring should be inserted into some sort of protective cover, like the common split-loom. Furthermore, wrapping the split loom with harness tape (not electrical tape) is even better, as it makes the harness water tight and OE in appearance. The retaining clamp shown is from Mr. Gasket and they work great for retaining wiring via screws or rivets.