As the title says I have a Skyport Speed transmitter. It has a 2.5mm mono jack. I thought to connect it to my Yongnuo 468 ii's PC Sync port. It does not fire. The manual says
"Integrated Hot-Shoe SYNC 2.5 mm Socket. Use the included Sync cable to connect the integrated 2.5 mm Mono Jack socket with the camera or lens PC socket directly."
I am trying to find the reason for the mono jack if not to connect it to an off camera flash? What would be the point of connecting to a camera using a cable when its already in the hotshoe?