^ That's what I would do, too - to insure that the device is mounted discretely.
Unfortunately, although we may know better, not all enforcers may, and may mistake the item for a radar/laser detector.
Why ask for trouble, right?
The GPS-Mirror may be a viable alternative solution, but even it would carry the liability of its detector interface display, which, although it would be *VERY* hard to see by the enforcer, may still be a tell-tale. In such a case, the use of a secondary kill-switch, dedicated to the detector (hopefully already a Bel STi-driver) would come in very handy.
In terms of completely concealing the C100, there is an input for an external antenna available on the left side of the unit
(facing the unit), towards the rear. This will aid in sat.-acquisition, should the user decide to seek the absolute most concealment possible, and literally "bury" the C100 somewhere.