what are these bits called and should there be 4attached

[nzrocketman]

My Drone only has 2x of the pins thingy attached and 4 of the absorbers is that correct or should there be 4 of the pins in each corner.

 

[Meta4]

My Drone only has 2x of the pins thingy attached and 4 of the absorbers is that correct or should there be 4 of the pins in each corner.

You only need 2 anti-drop pins.
Look in the manual and you'll find this: