Sony alpha 7 R IV Instruction Manual page 128

1.
Open both of the jack covers on the monitor side.
2.
Fit the two hooks (A) on the rear side of the cable protector into the two notches (B) to the left of the USB Type-C
terminal and Multi/Micro USB Terminal, and then align the cable protector with the terminal part of the camera.
3.
Push the attachment screw (C) in and turn it to secure the cable protector.
4.
Insert the cable into one of the jacks.
5.
Insert the cable into the holding part and then secure the cable with the fixing dial (D).
To remove the cable protector
Loosen the attachment screw, and then remove the cable protector.
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