Lightbridge 1 DBUS port pinout

[Mika Voskuilen]

Hello everyone!
I am new to PhantomPilots, and i used InspirePilots previously.
I am building a bicopter, and will be using Lightbridge 1, for video and control. Flightcontroller is CC3D Revo, flashed with INAV. The Lightbridge 1 has a DBUS port. In other forums, i have read that DBUS is identical to SBUS. The only thing: The DBUS cable that came with Lightbridge has only two conductors, and SBUS needs at least three: TX,RX and ground. Can anyone tell if those two cables are TX and RX, and where i can find the ground. Thanks in advance!
Regards,
Mika Voskuilen
(sorry for my english, i'm Dutch

 

[quaddamage]

I would assume the central pin is ground?

Never had LB, so I'm mostly guessing. Based on this pic.