For dewinterizing here is my checklist:
Going to dewinterize.
As to the connections for the TV here are the manuals you will need.
Don't forget that the digital channels are directional and when you rotate the antenna you might need to search again using the "AIR" (vs cable) setting on the TV's tuner.
I use a web source like antennaweb.org to determine where to point the roof antenna. Make sure the wall plate switch is to "roof" (light ON) and not park cable (light OFF).
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW