curious...how or what did you use on the tripod side? My tripods have that pop out plate with the screw (handle on the bottom side) embedded in it..can you post a picture of that side?
Mine is the same as the one you have. Screw one end of the Barrel connector on to the screw of pop off plate. Screw the small section of 1/4 20 stock in to the other end of the barrel connector. Place 2 washers over the stock and screw it in to the OSMO.
Manfrotto 488 head on a Manfrotto 190XPOB tripod