[HoosierDaddy]

I just installed a complete Zip Dee awning on 316. If u look above the rain gutter you will see where the curved portion of the roof is riveted to the inner framing. That framing extends down the side of your Newell to the floor . Use that to locate the rib of the sidewall. I used sheet metal screws through the siding into the inner rib. Location fore and aft of the awning is not critical . Zip Dee says within 18-24” of rear vertical awning arm. That is the end that anchors the inner counterbalance spring.