Better off posting this in the 5th wheel forum.
5th wheel hitches are not all universal.
PullRite Supergilde auto sliding hitch has a capture attached plate. This doesn't allow a std 5th wheel hitch to hook up with the pin.
And some 5th wheel trailers may be set up with the Andersen or PullRites GN ball type hitch.
Most likely if you have a std pin type hitch and your friends trailer has the std 5th wheel rv type pin box then it should hook up.
"good judgment comes from experience, and a lot of that comes from bad judgment" ............ Will Rogers
'03 2500 QC Dodge/Cummins HO 3.73 6 speed manual Jacobs Westach
'97 Park Avanue 28' 5er 11200 two slides