[General Maximus]

When you was talking about cables i thought you meant ethernet cables to connect your devices to your router. If that is the case you want to be looking for "cat5e patch cable", length and colour are up to you.

The reason why the shub has got 4 ports on the back is because that is the router part of the hub for you to connect your devices just like your belking router. When you put it in modem mode in makes the shub a modem which means the routing bits get disabled and only port 1 works to relay the data to another device just like a modem would. If you find you are running short of ports on your belkin router you can always keep the router with the shub and run a cable round to the room with the most devices and use a switch to connect them to the router