Mamiya 645 PRO TL - Manual (Page 22)

Advancing the Film to the First Frame
7. Insert the loaded Roll Film Insert
into the holder, the film roll on top,
while squeezing on both sides of the
Release Latch as shown in
illustration. Make sure that is been
properly seated and is locked in place.
Then close cover by firmly pressing
its top against the Roll Film Holder.
To close the Back Cover, firmly
press the top of the back cover on
both sides.
1 . While spanning the Roll Film Holder
between your thumb and middle
finger holding it
it on the rubberized
finger rests, carefully align its Film
Holder Mounting Bracket with the
corresponding center clip of the
camera body.
2. While keeping this alignment, press
the upper part of the Roll Film Holder
against the camera body, so that it
clicks into place by engaging the
spring loaded twin camera catch.
Set the multiple exposure switching
lever A to the white square mark
(normal mode).