Yes, the bottom rail, the rail the bed rail rolls on, has two holes one above the other. The push the bed out, until the end of the bed rail passes the holes and insert the pin.
On my 228, for the rear bed, I have to give it a push from inside with my thigh to get it out far enough for the pin. Front is just pushed with a hand.
And if the rear bed is not all the way out, the backboard for the skinny couch will bang against the bed rail.
Trailer: Lifted 228BH, heavy duty springs and Yokohama tires
TV: 2016 GMC Sierra Z71 4x4 CC, SLT
Spare TV: Two Alaskan Malamutes
Living somewhere in ID; previously lived in Moab UT; previous to that, don't ask!