If I've understood your requirement correctly, then just bung the magic eye into the RF In (Aerial Socket) on the TV.
The Freesat Box has no RF In or Out and is independently connected as a source to the TV via SCART or HDMI.
When you want to watch stuff from the remote Sky Box, just select whichever TV Channel number you've got the RF from the Sky Box tuned to.
To revert to the...



