With this in mind we have been taking ideas from
our customers plus spending a lot of time trying various options.
First we have a heavy duty mount designed to be
bolted to the tow ball.

This has been drilled to either take a heavy duty
ball mount or similar.
Next we have been working on a mount that can be
easily fitted or removed from the tow bar plus have the ability to
be hinged out with extension sections to provide a sensible
separation between the antenna mast and the back of the vehicle,
this is especially suitable for the larger 4 -wheel drive vehicles
and motorhomes.

As you see, there is a mounting plate that fits
between the tow ball and the tow bar - this then has the aerial
mount either directly attached to it or via one of the spacing
adaptors