Best Spot to Mount EZ Pass Transponder on GV60?

[WatsonS90]

I'm in a bit of a bind with my GV60 and my pesky EZ Pass transponder! I tried sticking it on the plastic housing behind the rearview mirror, but it just won't stay put - it's like it has a mind of its own. I'd really prefer not to slap it on the windshield if I can avoid it. So fellow GV60 owners, where have you cleverly concealed your transponders?

 

[quAVo]

Mine is attached to the front edge of the roof glass and secured under the molding.