Switch C1 (ID=16131)
The Yellow Toggle Switch
at the square marked
C1
reversez:
the Two-Way Arrowz
in square
K10
.
the Two-Way Arrowz
in square
L9
.
the Two-Way Arrowz
in square
M8
.
the Two-Way Arrowz
in square
N7
.
the Two-Way Arrowz 
in square K10.
the Two-Way Arrowz 
in square L9. the Two-Way Arrowz in square M8. the Two-Way Arrowz in square N7.
at the square marked C1 reversez: