I used a Stealth cord to plug in my Passport to the mirror.
I ordered a 12", instead of the 8" long cord. This allowed me to wrap the cord once around the mirror mount. I did this so when the suction cups break loose, the Passport will hang from the cord, without it pulling the wires loose from the mirror connector.
I just came back from a long trip and one of the mornings when I got in the car the Passport was hanging from the cord, instead of falling into the car and possibly denting some interior trim.