gkaan wrote

Is there a wall mount kit?  

Sure there are wall mounts, for example those (price range 5 to 20 USD):

First two kind of mounts shown above are standard 48mm ∅ wall mounts for SAT TV dish antennas. You even find smaller ones such as the third shown above (23mm to 35mm ∅) for WiFi gear in different variations, e.g. for tilting the pole/AP such as the fourth one. There are even more special ones such as for mounting on a chimney or below a roof eaves etc. All mounts are available at your next SAT HW store, WLAN store or on Amazon.

Mounting a CPE directly on a wall's surface should be avoided at all.