BTW: A simple fix that I use when looking for a quick and precision mount for adding devices to my machine (Threaded table) is to make an adapter plate.
Take a piece of 1/4 aluminum about 1 - 2 inches (25 to 50 mm) larger then the device (The precision vise in this case).
Drill some mounting holes into the plate that match your machine’s threaded holes.
Mount the Vise to the adapter plate (make sure that the vise is square to the level of precision that you need).
Now you can mount the vise anywhere onto the table (parallel to the X OR Y axis in just a few seconds.
FYI: Advanced User Tip: I have favorite vise positions on my table that I like to use, so after mounting the vise to the table the FIRST time, I carefully find the X, Y and Z position of the back left solid jaw, and record this dimension in a word document that I keep on my home page.
When I am ready to machine a part in a vise I mount the vise on the table, load my part to machine (I will also use the back left as my X0, Y0 during programming) and move my machine to this home positions (copy and paste from my word document recorded earlier) of the part located in the vise without ever having to measure anything again. Work Smart.