Sony PFM-50C1 Operating Instructions Manual page 71

Using the cable holders
You can efficiently bundle the speaker cables with the
cable holders B (×6) provided. Attach the cable
holders as shown in the illustration below.
1
If you don't use speakers, you can use cable holders A
(×2) and B (×2) that are provided to bundle up the
unused cables. The cable holders are attached as
shown in the illustration.
1
2
Rear
2 3
Rear
Connections
1
2
3
1
2
3
17
(GB)