We can't guess the makes and models of all the equipment you have so we can tell what connections you have.
Do you have a separate DVD and surround sound or both in one unit?
If they are in one unit then you will need to connect video out from that to one of the TV video inputs. You will also need to connect an audio output from the TV to the DVD/HTS. You may need a converter to make this connection,
If they are separate then the DVD connects to the TV with HDMI or AV cables. The audio out of the TV goes to the HTS.