Sinar copal shutter cables compatability?

Hi All, I have just bought a Sinar Copal shutter cable that cocks the shutter when a dds is inserted in the back. However the hole on the bottom of the back is threaded and the end of the cable has two ears on it looking like it fits into some kind of bayonet arrangment Obviously the two items are not compatable....The question is why? My back is on a Sinar 'C' so it is the wrong back or are the cables for a Norma back (the shutter end is fine)

Any advice much appreciated......Cheers Dave

Hi !
There is normally a threaded bayonet adapter to adjust the exact length of the cable to operate the shutter when the DDS is inserted.
As the play may be different from back to back, this threaded piece stays on the back on which it is adjusted for.
It is normally sold as a spare. Maybe expensive as are SINAR parts.

Thanks George for the info........You all know what's coming next!

Anyone got a spare adapter please? Cheers Dave