I like the triangle patches in the third pic. High on the side.
The circular one will get worn by your head (helmet) so I don’t think that is a good position.
In fact, per the theory that sometimes, “more is less”, I would skip attaching it to the seat; think the triangle patches are enough.
That said, if you have a flight jacket you wear with your work uniform, it would make a nice addition as a shoulder patch.
… I wonder what your passengers will think…