I had previously installed a XM radio on the cup holder area.
XM radio installed on cup holder.
I decided to see if I could fabricate a mount to place the SGIIon top of the radio. First I added a strip of Velcro on the length of the radio and SGII. This Velcro strip held the SGII, but was a little floppy.
Using some metal strapping, I was able to make a mount to attach to the radio. I had to bend the strapping using a hammer and vise to get a tight angle. I then wrapped the metal straps in duct tape for protection added Velcro to the side of the mount and SGII.
I ran the SGII cable connection on the edge of the engine cowling to the connector under the steering wheel. Very nice and neat. To remove, I just disconnect the SGII cable and remove the radio which is not connected to the radio mount by wiring (slips in and out) Note, I am not worried about being able to read the SGII at all times while driving. My BH does most of the driving anyway, and now I can monitor her driving.
ADDED 12/22
Jim, KB90MH also has his SGII mounted in the same area. Drives a 2012 3100PC