Switch L10 (ID=23070)
The Yellow Toggle Switch
at the square marked
L10
reversez:
the Two-Way Arrowz
in square
D3
.
the Two-Way Arrowz
in square
F3
.
the Two-Way Arrowz
in square
H1
.
the Two-Way Arrowz
in square
J9
.
the Two-Way Arrowz
in square
K10
.
the Two-Way Arrowz 
in square D3. the Two-Way Arrowz in square F3. the Two-Way Arrowz in square H1.
the Two-Way Arrowz 
in square J9. the Two-Way Arrowz in square K10.
at the square marked L10 reversez: