You shouldn’t be able to install them incorrectly. If you lay the blades side by sid, you will notice there are two pitched for counter clockwise lift rotation and two for clockwise lift rotation.
When installed the CCW rotating props will be on opposite sides and opposite ends. In other words, one set of like props will be on the right front and the left rear and the other set will be on the left front and right rear.
The counter rotating props provides equilibrium , making the drone very stable.
Hope that helps