Hmm..yes I was afraid of that…the gauge you have will be to fit the E61 group with a lever, those holes are drilled absolutely straight.
The Minima uses a solenoid group and the hole is drilled at a slight angle, this is to facilitate construction of the various channels. So to straighten the gauge the group manufacturer drills a larger hole in order to centralise the orientation. I think 6mm. This way the gauge sits straight. You might be able to get an adaptor. You might even get an inside outside thread adaptor to fit, but you would have to use thread sealant on the inside connection. and PTFE into the group.
You need to measure the threads carefully for diameter.
