This input board has a 3.5mm headphone jack for certain retro computer tapes. I don't have a complete list of the systems supported but the developer specifically mentions ZX and CPC, but not Commodore. I also don't have any tapes for testing.
If you purchased an IO board from me, the included screws will be long enough to mount this board. Otherwise, a 14-16mm long M3 screw will be needed.
More info can be found here.