You'll need:
A digital coax cable (75ohm cable with RCA connectors) to get the signal out of your UA5.
A coax / 7-pin cable to get the signal into your M1/D100/7/8.
There are some notes in the Archival section under the Cables and Related thread. Check it out.
BTW, for an M1, I believe an active 7-pin cable is your best bet.
(Soon to come in the Archival section: a compilation of notes on the difference between active/passive 7-pins.)