Please help me identify this Sontec

[ubxf]

Hello,
i just pulled out of storage an old Sontec board that i bought years ago but i can't remember if i had any docs that came with it.
From the serial it looks like the MES430c that is documented at Jacob's place. I was wondering if i could just apply +/- 28vdc and see if it passes audio, then try to figure out the values of the pots that need to be connected to make it work. I realize i'm pretty far away from a working unit but i'm willing to give it a shot and i'd appreciate any help or suggestions

 

[ubxf]

I found a picture from an ebay auction that looks similar

 

[ubxf]

On the schematic posted at Jacob's place the Power connector J1 has +/- 28v on pin 5/3 then i'm not clear on the other voltages
one of them should be +/- 15 v is it 7/9 ? Then on connector J3 there should be the connection to the 2 100K attenuator for freq and 5k attenuator for shape as well as 50K pot for level but i'm also not clear on the exact hook up