You could stick this to the windshield in the dotted area, then still use the suction mount. They sell different diameters. Get one with the red 3m backing. https://www.amazon.com/APVHB20-Strength-Adhesive-Mounting-Dashboards/dp/B00YPNVMUU/ref=sr_1_10?ie=UTF8&qid=1474567763&sr=8-10&keywords=3m+gps+disk+mount