Firstly, you have to log in your account. If you don't have any account, please register (directions in the link: https://sencoinex.zendesk.com/hc/en-us/articles/360020795311-How-to-register-sign-up-a-new-account- )
In the Homepage click on Exchange button on the upper right corner.
Then click on Wallets on the Menu
Find the crypto currency you want to deposit and click on the plus symbol
Click on the GET ADDRESS button if you haven't created the wallet address. Copy the letter string and use it to deposit your coin.