If there is not enough liquidity to use the first withdrawal method, you can wait until there is free liquidity, or you can withdraw your pro-rata share of free liquidity and transfer the pro-rata share of open positions to your wallet. If you choose this method, if they are exercised, you will receive the amount in your wallet directly, but if they expire without being exercised, you will need to manually withdraw the collateral back after expiration by accessing the Manage tab.