I was going to solder the two together when I realized I had a version 2 board that looks different enough from the diagram on the doepfer.de site (http://www.doepfer.de/a100_man/A138x_connection.pdf) that I thought I should ask where to connect the non-ground wire. The pdf diagram mentions version 2 but my board has different resistor locations.
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A-138xa and v2 A-138 lin installation
2009-05-16 by nicholas_kent