I just bought one of those 4x8 "made in China" trailers to tow behind my '01 SL1 and was wondering about the wiring, more specifically the taillight converter. I notice there are two kinds available...one of them that says it protects the towing vehicles computer and other sensitive electronics, and then the WAY less expensive one that makes no such claim. Which one do I use, is it necessary on the Saturn to use the "circuit protection" connector? TIA