Hi Jack,
I’m not sure of the make of my flip mirror as I bought it a few years ago and it is a generic one without a company logo.
There won’t be any side to side adjustments with flip mirrors, or up and down for that matter. They are designed so the light either goes straight through or is diverted up at a right angle. If you are using this in a finder setup then you would normally mount it within finder rings with screws to hold and adjust the finder scope position.
Flip mirrors aren’t usually used in finders. Instead you use them in the light path of your main scope so you can view with an eyepiece or another camera without have to detach your main equipment. Nothing wrong with using them in a finder, but there may not be any benefit to doing so.
Best wishes,
Andy