I am attempting to connect my ageing Marantz CD player to Sonos Era 100 to play CDs in a simple 2 piece set up. 

I already have the Sonos Line In adaptor and now need the connecting cable from my 2 RCA outputs on the CD player to the 3.5mm plug on the Line In adaptor.

Can anyone confirm I am buying the right cable, such as this ?

RCA Aux Cable 3.5mm Jack to 2 RCA Audio Cable Y Splitter Adapter, 

https://www.ebay.co.uk/itm/387804970731?_skw=2+rca+cable+3.5&itmmeta=01JH40RP6E0Z9KSH47H8X66CGV&hash=item5a4afa3eeb:g:ZIUAAOSw1Zdnfmqt&itmprp=enc%3AAQAJAAAA8HoV3kP08IDx%2BKZ9MfhVJKlmjjhkatjIry%2FAMkTfezcZXefczrb4xXMzc4rF%2F4BpSasnSva1vYUuyfe0HwqJSEpxuKP%2BzOJzwLASroVqbi3TpdAIRLMRFLiCj4T2vRToJr2RyRofRf6XRWUA94CGxWwawJARTlOp%2FnhYhb6DW016W%2FXeDbYHE7tDC%2F1ua5FHtH34aALkzfL7i%2FeqVVyuwweFpW49LzSHK84qF4bKW97pnIWMnMDRbZJNsgSEt2WhSbdSs6vi2SRYOHTxU16I1qwyYgHBnug8fNaj%2BNha1LsQ8ZQ3USqDSoOasoI%2BaJ0Bjg%3D%3D%7Ctkp%3ABk9SR6zj4oCJZQ

Or this ?

SOOMFON RCA to 3.5mm Audio Cable Aux 3.5mm to 2RCA Audio Cable 2 Meters, Red and White to 3.5mm Jack Cable with Durable Nylon Braided Gold-plated for

https://www.amazon.co.uk/SOOMFON-Durable-Braided-Gold-plated-Speakers/dp/B0CCRP9R1W/ref=sr_1_1_sspa?dib=eyJ2IjoiMSJ9.JcXjTD_ynlf7vnyr3ClQ8uue9A0g2kh1F9xTcqUuisdSLHoOHOJ6vtfjWiUTJPsGbAADIAwS22FR6jPc5A_VkbnNSISEET3MlWL6NehuwhLgTrNgxWvGCkj1z2wM9FBkEMct0RSvN7T5aFq_374SVHyXKL1KkKmbWzscmQ-5KUb3oDrBnx4JKQCt7XkkzTJhcNp0LI3qrIdJNWBai-vAB5s72XoWEYAk_TZbZaE4Tng.VglN2V-UHL_vKcejIFjFRhBNRRXdPn5rGjLzRVS9F-Y&dib_tag=se&keywords=2%2Brca%2B3.5&nsdOptOutParam=true&qid=1736376490&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&th=1

Thanks everybody