The electrical connection is as normally for Yaw and Roll. For pitch you need to connect the 2 motors parallel, and get their phase to match. You can connect any wire to any wire parallel, but need to swap any two if the phase does not match. You need also to rotate the motors so that poles match. It is not easy but possible.
When connecting two motors parallel the end resistance will be half of the original. make sure the board can handle that.