How to connect cable box directly to modem and not plug into the TV at all?

[janet.roe]

Comcast sold me - over the phone - on going from internet only to having a box and getting TV too. Only $5 more per month! when I told the guy I had the TV on the wall and did not want any boxes and wires into the TV he told me I could connect to the modem. I am not very intuitive when it comes to this stuff. Well, I got the self-install kit and the instructions clearly told me to attach the 2nd coax cable to the box and the TV. I did the chat with Comcast, and they wanted $60 dollars to send out an installer for wireless and an additional $30 per month. It felt a whole lot like bait and switch. Any help out there?

 

[USAFRet]

OK, we're going to go through this one question at a time:

On your current router, what cable(s) go into the back of it?