Plot show the card from top side, i.e. the side with connectors.

a cross section of the kapton cable, where
each cable/connector has 32 channels.
0-15 (in black) to chip on top side
0-15 (in red) to chip on bottom side

The extra number on ALTRO chip is the chipnumber

chipnumber chip
0	   IC35
1	   IC36
2	   IC16
3	   IC35
4	   IC17
5	   IC34
6	   IC18
7	   IC33

chips labelled in black is on top side,
red italic on bottom side.

readout channel number =
FEC number * 128 + chipnumber * 16 + channel number

the connector on front end card with numbering:
0-15 (in black) to chip on top side
0-15 (in red) to chip on bottom side

cable number connector
0     	     J5
1	     J6
2	     J7
3	     J8