If unable to connect to line behind it, are you able to remove the line from the grill itself? If so, do that and go to a LP filling business and see if they can make you up a new hose that will go from the grill to the tank. That's what I did in order to run a 2 burner grill (kinda like a tall "turkey" burner we call it) and reg gas grill at same time. Also had them make up a shorter hose to run from tank we carry in bed of truck to grill (tank is on the ground tho).