my Flywoo Explorer LR4 O3 came with a bent TPU antenna mount/holder - so I made a a replacement based on original dimensions.
In the middle there is a sort of an antenna-plastic-housing stopper (I've seen on another design that it might help) - this makes inserting the connectors a bit harder, but not impossible (as evidenced by my print). There's also Fusion360 file if you want to mod it away.
It prints without supports.
The author marked this model as their own original creation.