Originally Posted by StefanoS

That is exactly what the plug is for. When I was running the trailer wiring harness across to the right side taillight on my wife's NX450h+, I had to disconnect the lighted sill plate in order to temporarily remove it. The lighted sill is really a pretty useless "feature" on these vehicles. If I didn't have it, I would not miss it at all. It provides very little light and I already know that this car is a Lexus so, I don't need to be reminded of it each time the lift gate is opened. The upgraded LED that I installed on the lift gate provides the much needed light in the cargo area.