Roswell Speaker/Light Bar for Supra

[supralaunch21V]

Anyone have any thoughts on this? Just so you know, I'm mechanically ignorant to some degree.

I received 3 new lights from Roswell to replace the existing 3 on the speaker/light bar combo made by Roswell for Supra. I am unclear on how to hook up the new lights. Do I use the existing wiring harness from the old lights and run them into the new lights? The new lights have their own wiring harness and it looks like this would need to be removed if that is the case - which means taking apart the housing for the light - which I hate to do because it seems like it never seals as well as it did from the factory.