Off camera flash cord?

[ajf]

Another quick one.
Any reason this wouldn't work with a Yongnou 565ex?
It says for Speedlites, but presumably the yongnous are clones of these anyway?

http://www.ebay.co.uk/itm/E-TTL-Off-Camera-Flash-Extension-Sync-Hot-Shoe-Cord-Cable-for-Canon-580EX-430EX-/111271780413?pt=UK_CamerasPhoto_CameraAccessories_CameraFlashUnits_JN&hash=item19e850a03d

 

[a1ex2001]

Should work fine as all it does is extend the contacts.