I don't think there is one. However once you open the box it should make sense on it's own.
The antennas already have a metal ear mounted to it with another one in the box that connects to that one with the bolt. You first take that piece and mark drilling holes if you need to mount to a surface.
Then you can join both ears together at the correct downtilt degrees by tightening the bolt.
Make sure you always connect one antenna to the two connectors on the top or on the bottom of the AP. Do NOT connect one lead to a top connector and one to a bottom, that is wrong. The antenna wires are quite short so you'll have to mount the antennas really close to the AP.
If you're not connecting 2.4 GHz then you'll need to buy N-type screw on caps to protect from dust and water.