Release shutter cable ? Mamiya press hand grip.

Hey
I have bought myself a Mamiya universal press. Now im looking for a release cable for it. The cable have to go from lens to handgrip. The one I got with the camera got a button in one end.

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The question was, what kind of cable fit there ? What am I looking for. Because when i search for a release cable I only get up those with button on ebay and google

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It looks a bit like the release for the old Nikon grip but smaller.
The Nikon's, and the Mamiya(I;m guessing) were peculiar to each brand.

It might be usable with the release you have if you tape it to the handle and press it with your thumb.