Canon EOS 90D Instruction Manual page 253

Attaching the Strap
Pass the end of the strap through the
camera's strap mount eyelet from the bottom.
Then pass it through the strap's buckle as
shown in the illustration. Pull the strap to take
up any slack and make sure the strap will not
loosen from the buckle.
The eyepiece cover (1) is attached to the

strap ( = 157).
Part Names
(1)
41