Move Modem/Router to different room.

I’m an internet only customer and need to move the modem router to a different co-ax connection. I tried the one in the living room but there’s no internet. when I looked in the box outside, I see one wire coming from the pole and it connects to a splitter with one output going to the house. Then there are 3 other wires just disconnected in the box. Can I just change this until the street cable is connected to the LR?