Pin mapping on the backside

Pin Function
1 Jack 1 signal
2 GND
3 Jack 2 signal
4 GND
5 Jack 3 signal
6 GND
7 Jack 4 signal
8 GND
9 Jack 5 signal
10 GND
11 Jack 6 signal
12 GND
13 Jack 7 signal
14 GND
15 Jack 8 signal
16 GND
17 Jack 1 break/normalization
18 GND
19 Jack 2 break/normalization
20 GND
21 Jack 3 break/normalization
22 GND
23 Jack 4 break/normalization
24 GND
25 Jack 5 break/normalization
26 GND
27 Jack 6 break/normalization
28 GND
29 Jack 7 break/normalization
30 GND
31 Jack 8 break/normalization
32 GND