lewm
You wouldn't have a SUT unless you have a MC cartridge. It's cables go to the rear of the MM Phono you will use for the needed EQ.
To get in the back, and move cables each time you want to play a MM (stereo or mono) cartridge is not good practice, sometimes quite difficult as well.
Thus, get a SUT with PASS, play any MC or MM thru it, never need to change cables.