Connectors and connector counts. All of the male connectors will be on all of the boards already.
Per tree:

4 x 3-pin for input side of LED strips (main board)
4 x 2-pin for output side of LED strips (main board)
2 x 2-pin for main board power switching module (main board)
2 x 6-pin for sensor (main board and sensor board)
1 x 3-pin for flower motor (sensor)
1 x 3-pin for motion detector (sensor)
2 x 12-pin for dispatcher (main board and dispatcher)
16 x 6-pin for dispatcher (dispatcher)