The Q Brain is now ready to be attached to the quadcopter. We will be mounting the Q Brain between the top and bottom Dead Cat body plates. This position will allow the motor leads to be easily routed down the underside of the quadcopter arms, the battery lead to be routed towards the back of the quadcopter, and the control leads to be routed up through the top body plate to the flight controller (which we will mount in the next step). It is a bit tricky to describe the mounting position of the Q Brain in words, so definitely check out the pictures below. The work of actually attaching the Q Brain is done with zip-ties as shown in the pictures since the Q Brain lacks any kind of mounting brackets or holes.
After you are done fastening down the Q Brain, we will do a tiny bit of wire routing. If you look at the SK450 arms at the point where the arms meet the bottom body plate, you will notice a small kind of archway opening. Each of the motors are powered by three leads from the Q Brain. So, simply stick each set of three wires from the Q Brain through the archway on the closest arm.