I hate to think I'm defending a Comcast installer, but I can't imagine that any of their installers would let this pass. I know that they don't carry any such F-Connector. If anything, they get points for replacing ends and docked if a follow-on installer replaces ends. I cringe at the thought of a Comcast installer coming near an installation because they'll probably replace any end that they discover. This looks like D.I.Y. or electrician grade work.