Panasonic KX-T336 System Reference Manual page 108

To connect Amphenol 57JE type (screw-attach-type 50-pin
connector) to the Option Card, follow the procedure below.
1. The 50-pin connector (jack) on the Option
Card has two hook-pins.
Remove the upper hook-pin, taking out the
screw.
Screw
Hook-pins
Option Card
50-pin connector
2-C-24
2. To attach the Amphenol 57JE type (plug) to
the connector, drive the accessory Screw at
the upper part, and fasten the accessory Wire
Tie around the lower hook-pin and the
Amphenol 57JE type, as shown.