Where would you mount CB antenna on Class C

j-d, I ended up stopping at Home Depot and bought a 2x6 joist hanger. I came home and cut and bent it to fit the hood/fender. Then I mounted my "L" shaped bracket that I had. Put on the Firestick antenna and ran some new coax to it. Still getting off the charts SWR reading. I remove the L bracket and the new mount I made and re-bent the new hood bracket. I bent it so it was level and would accept the mag mount. I reinstalled the bent bracket I made on the fender and placed the mag mount on it. WOW!!! the SWR reading was 1.5:1. Maybe the "L" shaped bracket has a problem as when used with the Firestick, it gets very high readings. With mag mount its acceptable.
The mag mount with the new mounting bracket I made is very flimsy and would flop around and the base for the magnet isn't very large.