Next on our list of stuff to mount is the radio receiver module. Since the wires we will use to connect the radio receiver to the flight controller (in the next step) are fairly short, we will mount the radio receiver right next to the mounting plate on which we mounted the flight controller.
Specifically, we will mount the radio receiver onto the top body plate just in front of the flight controller assembly. If you look at this area, you will see two large holes in the top body plate. Position the radio receiver between these two holes and slide it partially underneath the flight controller mounting plate so that the radio receiver pins are accessible through the horizontal slot on the front of the flight controller mounting plate. Fasten the radio receiver down with a zip-tie.
The radio antenna will be dangling out the front of the quadcopter. This might be problematic though since it could theoretically find its way into one of the props. So, just stick the antenna down through one of the holes in the top body plate next to the flight controller mounting plate. Then, thread it the rest of the way through the quadcopter by simply sticking it down through one of the holes in the bottom body plate. The antenna should end up sticking out the bottom of the craft where we can be relatively certain it will not encounter any interference from any of the other electrical components.