I modified the shark fin for the source two to hold axii antennas. There is one design for the full size and one for micro axii antennas.
The hole for the pigtail is large enough to fit a 90 degree MMCX connector and will feed through one of the center holes on the top plate. I mount my VTX on the underside of the top plate so I just have to unplug it from my FlightOne Flight controller to remove the top plate for repairs.
I used supports to hold up the antenna mount. I was able to print the rest of the fin without any supports.