Paxar Monarch RF Link 7400 Operating Instructions Manual page 4

2.
Squeeze both sides of the module and snap it into the slots beneath the
terminal (below the keyboard).
PDT 3100
To install RF link onto the PDT 3100:
1.
Insert a 9-volt (PP3) battery in the module. See "Inserting Batteries" for
more information.
2. Hold the terminal in your hand so the keypad is facing down and the
display is away from you.
3.
Pull on the elastic hand strap and unlatch it from the slot just above the
open connector.
4.
Turn the terminal over so the keypad is facing up.
5.
Hold the module in your other hand so the LEDs are facing up and the
open connector is close to you.
4 RF link Operating Instructions
Squeeze here (and on other side).