Like Charles A said;
I dont like using the rear windage type bases because I have had them
fail .(Break or just come loose).
They were needed back when most scopes had only 10 MOA of windage
but now most scopes have 40 MOA so they are not as important.
My first choice for your needs would be the dual dove tail type or the cross
slot style( Picatinny,weaver).
But if you want to use the dovetail & rear windage type then hear's 1 way
to install them.
Install the front dovetail with some anti-seize on the dovetail (this keeps it from
gaulding and allows it to turn easy).
Then center the windage adjustment of the scope.
Place the left hand adjustment screw in and install the scope trying center it
in the midle of the rear base.
Go to the range and shoot a site in shot and adjust the windage base close to your
windage zero.
Once you are close ,remove the left windage screw and apply a "Small" amount
of locktight , replace it and bring it up by hand to the scope ring and tighten both
screws.
Later if you want to remove the scope for any reason you can remove the right
screw only,rotate the scope off,then replace the scope and the right hand screw
and you will have "almost" the same zero as before.
My failures have been the screw heads have broken off so dont over tighten.
J E CUSTOM