After your Trading wallet has been activated you can click on either TOP UP or on the asset you want manage.
Clicking on the asset you will see this panel that allows you to Import/Withdraw your assets.
These will be standard transactions on the Ethereum blockchain towards a smart contract.
Deposit on your Trading wallet
As you can see you will be redirected to the transaction page where you can establish how much you want to deposit on your Trading wallet or withdraw from your Trading wallet to your Personal wallet.
Full Article can be found here