Specifications

Psion Teklogix 7535 G2 Hand-Held Computer Quick Reference Guide 21
Stretch the handstrap toward the base of the 7535 G2, and
hook the bottom of the handstrap into the slot near the base of
the battery pack.
1.3 Attaching A Pistol Grip
The pistol grip is attached to the back of the 7535 G2 using the four
threaded inserts in the upper part of the 7535 G2 casing. Four black
#4-40 Phillips head screws are provided with this accessory.
Note: Prior to installation, make sure the trigger mechanism is
securely snapped into the pistol grip body and that the
trigger operates properly.