Just ordered the Sirius/xm Onyx, any pics or suggestions on mounting? Dont really want to stick it up on top of the dashboard.

 

Mine was installed by a pro, who put it to the left of the steering wheel on that little area next to the front left triangular window. It's reasonably out of the way. I think it beats being in the middle of the dash over the head unit.

 

How did your installer hook it to the HU? Did he use FM modulation?

Post a pic to help the OP and others who are going the ONYX route.