Don't add bungee into the trolley chord
it will not work properly. If you want to make it easy on yourself just attach each end of a 3 ft section of bungee to brass snaps. Then attach 1 snap to the anchor trolley ring and the other to 1 of your deck loops. When you want to use the anchor or drift sock just remove the snap off the deck loop and attach it to whatever your going to use. Makes things a lot easier.