Siemens SIPROTEC 5 Series Hardware Description page 125

Loosen the 2 screws for fastening the shielding plates on the device next to the 16-pole or 17-pole plug
²
so that there is somewhat more than 2 mm (0.08 in) space.
Push the prepared shielding plate under the screw heads and tighten them.
²
Plug-in the plug and fix it with its 2 outer screws.
²
[le_ shielding_plate _screw fastening, 1, --_--]
Figure 3-85
(1) Fastening screws for shield plate
Repeat the steps for the 2nd plug.
²
SIPROTEC 5, Hardware Description, Manual
C53000-G5040-C002-C, Edition 10.2017
Fastening with Screws
3.4 Input and Output Modules of the Non-Modular Devices (7xx82)
Electronic Modules
125