You can, but the adhesive should be applied to a clean, smooth, dry surface when the temperature is above 50°F (10°C). If the temperature is below 50°F, you can heat the surface with a hair dryer before application.
The booster needs to be correctly assembled to its designated wall bracket in order to function. The designated wall bracket has a notch on it. This notch ensures the motor only works when attached to the bracket. All other brackets are flat.