Zeiss Ikonta Shutter - Rapid and Synchro - both have flash?

(Asking here because of the great expertise here. I also posted to the MF 
group.)

It was/is my understanding that the old Zeiss Super Ikonta 'flash' shutter

was called a Synchro, and that the Rapid and other shutters had no flash 
terminal.

However, on that big auction site a fellow has one with a Rapid shutter
and 
claims that it has a flash terminal. He says it is just next to the
shutter 
cocking lever. Is this atypical or am I just flat wrong?

It's item #230226141947


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