Studiomaster II pin out on AE71 socket?

[jbmia]

Ran across 5 of these with the stands, lights, reflectors, diffusions, barn doors, etc for next to nothing.. They only came with (1) AE71 though and I've ordered a few NOS ... The manual mentions a "trip cord", but I haven't been able to find a trip (sync) cord that would plug into the Octal socket the AE71 fits in. Anyone have any feedback on which pins I'd tap into to retrofit a 1/4" plug (or whatever) into these units. I don't want to invest too much time and money into these old units, but they seem to work fine and was thinking of rigging up a sync cord tied for my old analog gear and maybe tie into my RF-603C II's if the voltage wasn't too high (max 300v on those). Sample pic of unit with trigger socket right/front on top... Appreciate any pointers.

 

[John Koehrer]

Can you get to the back of the plug? It may be as simple as them using the 7 pin as a proprietary connector
using only two contacts.

 

[jbmia]

Thanks.. these units actually take an AE71 flash sensing tube that triggers the light based on an external flash.. I imagine they'd be using more than 2 pins to make that happen.. I can always pulled out the multimeter, but thought I'd check in here first..

Can you get to the back of the plug? It may be as simple as them using the 7 pin as a proprietary connector
using only two contacts.