It might be
IDE Data cable (used on old model Hard discs) and not the Sata cable. Sata Cables are only for internal wiring and difficult to get more than 2 Ft length.
Data transfer through IDE is phased out from Computer applications, so sellers do not stock and getting in desirable length is also difficult.
But similar flat cables available online for electronics application can be looked into.
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Yes, sorry my bad, Its IDE cable not Sata.
I have tried multiple cables, Telephone cables, variety of power cables for the same purpose. But none made a good difference.
Another Good Option which got Good SQ was with Dish Antenna Cables (BNC type) . You'd need 2 on either side. If you want better SQ you can increase the cables to 4 on either side and braid them.
1.Bluejeans 10 White surpassed all these Speaker Cable experiments. This is a great cable and VFM too.
2. Kimber 4pr at 300rs Feet was better than Bluejeans 10 white, which was locally available with the Dealer. This is quite VFM and after this you need to spend at least 4 - 5 times to get Kimber 12Tc which is a significant upgrade.
3. A combination of 4 Solid Core Copper 1sq mm Cable + Multiple Fiber Copper Cables like Bluejeans 10 white or DAC Extreme 2 or Finolex 4 sqmm was way superior to option 1 & 2. That's mixing 2 types of speakers cables of same length and running in parallel from end to end. You'll get better results if one of them has spade connectors and other cable has Banana or Bare Wire.
BTW, I ended up upgrading to Kimber 12Tc then to Transparent Audio plus speaker cable and Later to Kimber Select 3033 speaker cable eventually. I haven't found anything decisively better than Kimber 3033 in my setup. Need to try Nordost Red Dawn, and other Reference Speaker Cables if I get a chance.
I'm leaving you with a picture of my last DIY speaker cable, that's a Combination of DAC Extreme 2 and Solid Core Copper 1sqmm x8 (from AliExpress) . It sounds better than options 1 and 2, and anyone can make out the difference.