Mamiya M645 Super User Manual page 17

In the same manner, insert a roll of film
in the upper compartment. At that time,
check that the film leader paper is set
as shown in the photo above. (The
leader paper inside is facing outward
on the pressure plate. Note that the
film direction is wrong if the leader
paper is facing inward.)
Pull out some of the leader paper.
Insert the tip of the leader paper into
the slot of the lower Take-up Spool.
Gently rotate the Take-up Spool in the
direction of the arrow until the start
mark of the leader paper is aligned
with the start mark (A) on the Spool
Clip. (Correctly align the start marks
with each other, taking care that the
film is not rolled excessively.)
15