Not on a Bay Star but on another class A
THe Pillar in the photo you posted. Between the Windshield and the driver's window
I got a "Mirror Mount" No ground plane antenna. This has a bracket that is two pieces one is more or less "L" shaped and holds the asntenna, the other well if not for the bend around the arm it would be flat (both pieces have this bend) 5 bolts clamp it to as "West Coast" type mirror
THe Mount or one like it
Now mine both halves had the "notch" aprt to clampt to the mirror
The antenna is a NO GROUND PLANE.. The Firestick si a good one though Mine is different.
I attached the antenna to the mount and positioned the mount on the pillar so that the TIP of the antenna is ... by about 1 inch.. the HIGHEST part of the motor home when goign down the road (auto-stick bridgges)
The cable was passed through a hole drilled in the Pillar, into the channel (you can remove the inside cover) down to the radio.. IT was sealed with GOOP. and in my case due to teh bracket having the "Tunner" notch it comes out under the bracket, aroung to the bracket and .. Done.
neat, Clean, Legal height, No need to worry about bridges.