Adding a trigger channel to the LSL stream

Hello,
I am currently designing an EEG motor imagery experiment with real-time classification and need a trigger channel in my LSL stream. I need the trigger channel to know when to start collecting the data and know what the trial condition is within the python code I am running.
I am currently using the PsychoPy software to design my experiment with the OpenBCI's EEG device. The triggers are currently designed to be sent through PsychoPy's parallel port function. I was hoping that the Cyton board could pick up the trigger sent and add it to the LSL stream, but I have not figured out how to do this yet. I also tried using the OpenBCI GUI and OpenBCI LSL app but could not figure out how to add a trigger channel.
I am very new to OpenBCI as this is the first time I am using their EEG device, so there is a lot I still do not know.
I also emailed OpenBCI and was told that @wjcroft, @retiutut, and @evaesteban might be able to help.

Please let me know if anyone knows how to add a trigger channel to the LSL stream on the OpenBCI Cyton EEG board.