Here is the mapping of the trigger output of MAC-B modules to FEE64 modules

3.1   NNAIDA5   veto-X2
3.2   NNAIDA14  D4-X2
3.3   NNAIDA13  D5-X2
3.4   NNAIDA6   D6-X2

4.1   NNAIDA28   -
4.2   NNAIDA27  D1-Y1
4.3   NNAIDA20  D2-Y1
4.4   NNAIDA19  D3-Y1

5.1   NNAIDA12  D4-Y1
5.2   NNAIDA11  D5-Y1
5.3   NNAIDA3   veto-Y1
5.4   NNAIDA4   D6-Y1

6.1   NNAIDA25  D1-X1
6.2   NNAIDA17  D3-X1
6.3   NNAIDA18  D2-X1
6.4   NNAIDA26   -

8.1   NNAIDA29   -
8.2   NNAIDA30  D1-X2
8.3   NNAIDA22  D2-X2
8.4   NNAIDA21  D3-X2

9.1   NNAIDA15  D4-Y2
9.2   NNAIDA16  D5-Y2
9.3   NNAIDA7   D6-Y2
9.4   NNAIDA8   veto-Y2

10.1   NNAIDA1   veto-X1
10.2   NNAIDA9   D5-X1
10.3   NNAIDA10  D4-X1
10.4   NNAIDA2   D6-X1

11.1   NNAIDA23  D2-Y2
11.2   NNAIDA32  D1-Y2
11.3   NNAIDA31   -
11.4   NNAIDA24  D3-Y2


MACB modules are labeled, from left to right, according to their position in the NIM crate.

D1 is the most upstream DSSD, and veto the most downstream one.