A standard sync cable should work... However, Rollei had a locking version too. My Rolleicord has a little release lever next to it. Strangely, my Rolleiflex doesn't.
Steve.
I direct my Right Honourable Friend to the first pic on page 170 of the New Toy thread
The x sync is in the middle of the self timer.
There were a few different versions, some without the X and V switch at the top and different x sync/ self timer arrangements.Yes. It has the sync socket but the switch for electronic/bulb flash/timer is around it rather than the locking release lever (I think).
Steve.
The XV switch is also the self timer apparently.
The timer controls are best left alone. Don't even try it to see if it works!