"Please let me know how to install the missing files"
It is very important you DO NOT install Update Pilot APK. That one is only for the original H520 and may cause damage if run on your H520e system.
DataPilot and Update Pilot are both for H520 ST16S.
These files have no place on your H520e ST16e.
(I do not have an H520e ST16e. The screenshots I uploaded are from an ST16S, with part of the ST16e firmware loaded to provide you with pictures.)
It is interesting to note you mentioned you had bought this controller already damaged. There is some history of H520e controllers being damaged by attempts to run UpdatePilot. Some experienced members may be able to comment if your symptoms suggest this may have happened.
"Unfortunately but it doesn't turn on like other drones to the screen only green first and I have to go through yuneec 2.0"
This is the easy part of the problem. You can set the "Home" screen to DataPilot2,0 as shown in this image:
View attachment 30389
"still it doesn't connect to the drone only there is a map and it doesn't detect any networks (even home networks)"
Please check the status of the WiFi button in settings. If the button is off, try to turn it on. If it will not turn on or if it turns back off immediately, it implies a bad WiFi Module in the controller. If the button is already on, it implies there is some other issue.
These comments may not be valid. One of your pictures shows you connected to "Lenovo_EXT", which seems to be a Wi-Fi source.
View attachment 30390
"and there is no camera and no drone."
This may resolve after you get Wi-Fi to work. It will probably require re-binding. Have you performed "OFDM Module Re-bind" on page 12 of the attached manual?
"Most probably the OFDM module is faulty because it blinks and in another working one I saw that there is a continuous light."
Here, we must rely on members with knowledge of the H520e.
"and what I can do about connecting the drone to the station."
This will require resolving the Wi-Fi issue and possibly better binding guidance from members familiar with H520e.