Jump the last open collector pin of transistor to pin 7 of DB-9 connector.

Bend the last open emitter to the open pin header in the edge, and solder it - this serves as our power input pin.

Finally, connect the other pin on the edge of pin header, jump wiring it to the pin 1 of DB-9 connector. Note that it's on the other side of the perfboard. This servers as GND.

Now the connector is ready. Connect GPIO pins from LinkIt Smart 7688 to the pin headers, and connect

Connect this module to Motherboard and D-Sub connector of the lightsaber