Some antennas are made to be "ground free" , but are not efficient as an antenna with a true ground . The antenna is the most important part of having a good working radio .
I mounted mine on the cowl and ran the cable through the wiring harness grommet. The base stores nicely on the plate in engine compartment when not in use.
The antenna requires that length of coax to properly tune it, I made the mistake of shortening one and couldn’t get it dialed in, new coax, no problem. Pretty sure that was in the install instructions from FireStik, just sayin!
Uh, no. Just "no". That's an urban legend with no basis in truth, according to a pair of RF engineers of my acquaintance.
As for the OP, check the existing connector and see if its the type where the outer shell will thread off, leaving a much smaller inner core that you can fish, then screw the shell back on.
I have the same base the connector comes apart and allows easy fishing through a grommet. I kept the cable full sized and just coiled it up. My Midland MXT500 works fine with this setup.
It’s a MXTA51 base with 6” antenna. It came in the box with the radio. I upgraded to the MXTA26 6dB antenna.
The MXTA12 base has a different connector and I don’t know if it comes apart like mine does. Seems like it has a rubber cap on it.
Ran antenna cable through windshield wiper harness grommet. My Midland radio is mounted under the steering column. And the cable ended up being a fairly straight shot into the back of the radio. I cut out the excess cable, so I wouldn’t have any coiled up.
The pliers I used to crimp the cable ends…
The tool I used to strip the cut ends of the cable…
Ran antenna cable through windshield wiper harness grommet. My Midland radio is mounted under the steering column. And the cable ended up being a fairly straight shot into the back of the radio. I cut out the excess cable, so I wouldn’t have any coiled up.
Essentially, yes.
I used an 1/8” piece of plastic underneath, where the set screws tighten down. As not to chip the paint and cause corrosion.
Some will tell you that the set screws need to touch metal, to complete a ground.
That is not the case with this antenna mount.
Mine works perfectly.