No you are not blind. The photo does show the dipstick though.
Beside the difflock pedal below the 3ph response control slider is a recess for the diff dip stick . The photo shows it is covered in dirt and easily overlooked, also the handle loop is sitting flush which makes it even harder to spot.
I hope the description is good enough, it is easier to show than describe. It would be very easy if I knew how to put an arrow on the photo.