Now that you have found where to hook up the grill you will likely find that:
1) It is cumbersome making the connection on the bottom of the grill
2) You can't push the grill back in with the hose connected -
I modified mine by changing the direction of the connection on the bottom to point toward the rear of the camper - got a longer quick connect hose - drilled a hole and fed the new hose through the bottom of kitchen - secured it to the underside of slice out with stress relief strap and keep it coiled up under the slide. This allows me to keep the under grill connection connected all the time and the hose is out of the way when using the grill. If you want the details I will take some pictures and tell you the details as to the fittings needed and where to get longet hose.
Bill & Jo-Ann
2019 Jayco 317RLOK
2015 F-350, 6.7L, SRW, Bilstein Rear Shocks