Rise of the tomb raider release frozen catapult / trebuchet / crane puzzle

Twitch prime - 30 days FREE trial --- https://amzn.to/2kb1xnB Since it has been asked many times: no, the video it is not stolen, the big black rectangle covers the Bandicam watermark from recording with trial version. How to release the frozen trebuchet in The Lost City in order to shoot the door down. Break the ice off the gear and fire the trebuchet.