I picked up a secondhand, but apparently never used, Foba track system, and am trying to figure out what's the best way to connect a Broncolor Primo flash head to the bottom of the pantograph.

I've only ever used the heads on stands, which have a baby pin. The stand/umbrella adapter on the head, which is removable, has a socket for a baby pin, and the pantograph also has a socket for a baby pin.

Should I use a double-ended pin? Or is there a different piece that replaces the stand/umbrella adapter and would work better?