What are the arrows for on the 12 Volt Receptacle?
For the most part, nothing. Some 12 volt chargers include a special “locking” feature however, most do not. If a charger you will be using with DeckTunes happens to include this feature, insert it with the tongs in line with the arrows and twist to lock charger in place. Simply twist back in line with arrows and pull towards you to remove. Chargers without this feature will still fit and operate properly with this outlet.