Agree that the pin should be lower that the hitch. IIRC, the 16k Reese jaws should push open and then close around the pin. Make sure it is closed, and do a pull test.
Jayco Designer 30 RKS Medallion pkg, Trail Air pin
'05 F350 6.0 PSD CC 4x4 DRW LB B&W Companion, Edge Insight
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