Cable problem, 2017 Catalina

[Eddie2002]

Just got back from a 4 day shakedown trip to St Augustine Fl, and found a problem with the cable wiring in the RV.
Here's what is going on, I'm getting a fairly good picture on the TV in the main room while on campground cable. When the second TV in the bedroom is turned on the TV in the main room gets snow and a weak picture for the lower channels.

I pulled the cable/antenna control panel and found loose connections which I tightened but still have the snow as a problem.

I haven't tried both TV's on the roof top antenna yet but expect the same snow on the main room TV.

I'm betting that the signal spliter downstream from the control panel is the problem but can't find it. Anyone know where it could be?

I did a search for the problem which was a great help but couldn't find the location of the spliter on my model.

Thanks