Pin  Left Connector              Right Connector
----------------------------------------------------------------------
 1   Sequence Step 0             Sequence Common
 2   Sequence Step 1             Sequence Step 7
 3   Sequence Step 2             Sequence Step 6
 4   Sequence Step 3             Sequence Step 5
 5   N/C                         Sequence Step 4
 6   N/C                         Pattern Read, track 0
 7   Pattern Write, track 0      Pattern Read, track 1
 8   Pattern Write, track 1      Pattern Read, track 2
 9   Pattern Write, track 2      Pattern Read, track 3
10   Pattern Write, track 3      Pattern Read, track 4
11   Pattern Write, track 4      N/C
12   Scanner Step 0              N/C
13   Scanner Step 1              Scanner Step 7
14   Scanner Step 2              Scanner Step 6
15   Scanner Step 3              Scanner Step 5
16   N/C                         Scanner Step 4
17   Tempo Up                    N/C
18   Tempo Down                  N/C
19   VCC                         N/C
20   GND                         N/C