Today was the day, ya know, camping, to put the Pepwave antennas on the roof again as I got two new WiFi pepwave antennas (formerly known as 201's). As I had an available path over the driver's AV box I dropped the lines through and connected to perform a test. Welp, the test didn't go well. I'm not sure what I had so right the first time that is not happening now but long story short, I quickly removed the antenna and sealed the path back up. However not all is lost. Instead of dealing with rabbit ears flopping around I connected the pepwave antennas to the pepwaves (both of them) and will use these as indoor antennas. They are working well and now my OCD'ness won't have to deal with rabbit ears not sitting perfectly.
Saga closed, no more antennas on the roof. Very pleased with Parsec cellular performance so my conclusion is, put your cellular on the roof, your wifi inside, and be done with it.