Hold-Down platform pivot

[Dastan1589]

Hello,

I've had this doubt for a whali now... how is the hold down platform prevented from pivoting around the strongback? There is a pin to ground to erect the rocket but its not connected to the platform. Then there is the pin at the middle of the platform with a hydraulic cylinder to take the pin out to allow the strongback to retract but I don't see any other connection. Does anybody knows how this works? I'm guessing the rocket prevents the rotation but how would they bring it down without the platform pivoting around that sole pin? Thanks to anybody who can give an answer.