I used a pre-existing hole from an old phone line and just sealed it with silicone, used external grade cat5e with cable clips to tack it down to start with and then just zip tied the cable to existing sky cable runs.
6 runs seems a lot, could you not achieve what you want with a switch either end or will the cables be going various places?
6 runs seems a lot, could you not achieve what you want with a switch either end or will the cables be going various places?