I think anyway you do it you are not going to be able to close the case again unless you can get those pins back down. You could use the female end of servo extension (cut the other end off) and take the shroud off. That will leave three pins sticking out. That will plug into the gyro/esc board. Solder the other ends to the pins. Like I said, I don't think you be able to close the case. Another option is to switch to a different (better) receiver which will be less glitch prone than the stock when using brushless motors. You need to make up or get a Y cable to connect the brushless speed control to the receiver and the gyro/esc board. You will need to use the stock power connector for the tail motor ESC. Don't connect the power lead from your speed control to the gyro/esc board, just to the receiver. You don't want power going to the receiver from two sources. You only need the signal and ground wires going to the gyro/esc board.

I hope this helps.
Chris