There is a little chrome lever right next to the crank handle. When the crank handle is released, pull the little lever as far as it will go while two people on opposite sides of the hardtop GENTLY rock it around a bit while lifting up on it. This should release the center rear peg from the car. Once the top is off, the entire mechanism is visible when the top well cover is open and the soft top is up. The release for the center peg is operated by a cable, much like a bicycle brake cable. Make sure the cable is in good shape and lube the mechanism with some light grease. Wipe away any excess grease so it does not stain the soft top when it is stowed in the top well. Good Luck!
Colin