where should you align the black curved edge of the target on the display?

When using the zoom ring on a CTS-1300 while adjusting the Left Camera for lift size, where should you align the black curved edge of the target on the display?

A.
So that it touches the right red vertical bar on the display.

B.
So that it touches the left red vertical bar on the display.

C.
So that it touches the right edge of the display.

D.
So that it touches the left edge of the display.