Looking to upgrade to BT Smart Hub 2 and WiFi Discs but still use my time capsule.

Currently I have my BT Hub plugged into my Time Capsule so we connect via wifi to it for internet and backups - the wifi on the BT Hub is turned off.

Can you set up the Smart Hub 2 and wifi discs so that I can still back up to the time capsule and still retain the benefits of the seamless connection to all the discs around the house? I dont want to have to log on to the wifi of the time capsule to do a backup each time.