The information which sector is protected by the different sam sites is stored in an array.
The first 16 bytes hold the information about the sectors A1-A16 (marked in yellow). The end of the first row is marked by 00 00. After that there are again 16 bytes for the second row of the map (B1-B16), then again 00 00 to separate the second and third row...
The last byte for sector P16 is marked in blue.
Each byte has a value between 00 and 04, which specifies the sam site.