First, you need to open an account on Bittrex. Once you do, you need to go to the Wallets tab on Bittrex and find your MCO deposit address (type MCO in the search box). Clicking on the + sign on the left will show you the MCO deposit address.
Please read the warning that pops up and make sure you only transfer MCO to that address. Make your first transfer with a smaller amount of tokens, so that you make sure everything works well. The transaction may take some time, depending on how busy the network is. If everything is okay, you may transfer the remaining tokens. 

Be VERY careful when transferring tokens - we will not be able to reverse an incorrect transaction.

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