Its probably much easier to remove the tank, you need all the help you can get to access the connectors.
Undo the bolt at the rear, pull it back then undo the pump cable and try to start it.
Starting releases all the pressure from the fuel line which makes it easier to release the quick connect.
You will also have to release the vent line, it's just pushed on.
On my V7III I also unbolted the front coil.