Who has purchased the Honda accessory for 12 Volt power? Part number 08U55-MCA-101. It looks to be a simple bayonet connection but a rather short cord. Where does it connect? How difficult is it to install? How many watts or amps does it handle (we would only use it to charge a cell phone or an air pump). Should we go with the genuine Honda accessory or something else? Is there anything else we should know?