Yamaha RX-A1020 Natural Sound Stereo Receiver 146008014202 there is a cable sticking

there is a cable sticking out the top and we are not sure what it is for but it does nto seem to effect performance

Manufacturer Realistic Model Number DX-300 SKU 19-73953 Ref 23-107604

Manufacturer Berkely Process Control Model Number DSM51-0-0/C3

Manufacturer Proteus Model Number 98008RFR10P1 SKU 19-27099 Ref 23-34043

Manufacturer Dell Model Number Optiplex 5080 SFF SKU 19-76065 Ref 23-109548

Yamaha RX-A1020 Natural Sound Stereo Receiver 146008014202 there is a cable stickingThis item is out of stock. Contact us to be notified when it becomes available again. Specifics Manufacturer Yamaha Model Number RX A1020 SKU 19 73453 Ref 23 112922