That's what's know as a POL (Put On Left) LP connector. It's still used but only in rare instances. While it's acceptable, I would change out that pigtail to one with a Type 1 connector as soon as possible.
Take a picture of where it connects to the regulator and we can help you choose a new one.
As for the detector, Is it disconnected or just have a fuse pulled?
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Salem 29RKSS Pushing a GMC Sierra 2500HD!
Gotta go campin!
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