Decide the stance relative to the telescope, either from the back, left side or right side. This will determine which finderscope goes where.
Left: the challenge in this photo shows how the scopes are mounted without attention to observational positioning. Once the scopes are mounted, the positions can be decided. Using dovetail bases can allow for quick interchange. Currently the plastic finder is not interchangeable.
The most frequently used finderscope will be located in the most convenient location. Generally, even a back centered stance will favor the left or the right position. The photo shows three different finder scopes. At right, the Svbony has the ability to show the deepest magnitude. The laser can quickly point to objects at night without looking through it. The middle finder is very lightweight and and shows less magnitude - less confusing during heavily light polluted skies.