SKY-WATCHER Star Discovery 2i Instruction Manual page 9

Part II: Getting Started
The secondary plate is designed to support light accessories (< 400g).
Please do not install a digital single lens reflex camera (DSLR) or a spotting scope
on the secondary accessory plate. The mounting bracket may break, or the
secondary accessory plate may bend over the accessory installed below.
It is also possible to attach two devices on the mounting
bracket by using the secondary accessory plate. You will
find the secondary accessory plate and two screws inside
the box.
To mount the secondary accessory plate: locate two
threads on the internal side of the mounting bracket
1) and use the two screws
secondary accessory plate
(part 1). Take care to mount the secondary
bracket
accessory plate with it screw on the same side as the
screw of the mounting bracket.
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(part 2) to assemble the
(part 3) on the mounting
(part