Robert....I bought the SMI unit and it came with the "T" that Walt is describing. Check your parts that came with the brake system for the "T". I was also a little hesitant to tap into the brake line, but it was as easy to do as Walt described. The only thing I did different was add the corrugated plastic wiring protector (the stuff that's split and used over wiring projects...available at Home Depot) over the brake line. I wanted to make sure it had extra protection all the way back to the hitch connection.
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Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
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