COMPATIBLE AUTOGUIDER CABLE ST4 RJ11-6P6C KABLE FOR ZWO ASI PLANETARY CAMERA TO ASTRONOMICAL TELESCOPE EQUATORIAL MOUNT - AliExpress
Optimal cable wiring for Autoguiding - Mounts - Cloudy Nights
ST4 I/O to RED SYNC Cable - eMotimo
ZWO ASIAIR | UPDATE: The ST4 cable is not required when using the Celestron CGEM DX Mount with the ASIAir and using Skywatcher SynScan as the mount setting | Facebook
ES-10 Ducati ST2, ST3, ST4, ST4S Hi Cap Electric Upgrade Cable Kit | eBay