Panasonic AJ-YAD250 Operating Instructions Manual page 7

Installing the AJ-YAC150P board
5.
Remove the two screws, then remove the connector
clamp on the rear panel.
Screws
6.
Pass the two coaxial cables through the holes in the
side of the slot marked "H2" on the main unit side to the
rear panel end.
Connector clamp
H2
7