That's perfect man , Cool that you have closed the SAS loop as well 🙂 Your cabling right and is as per the Netapp Best practices 🙂
In future if you expand your environment and have doubts regarding cabling u can always run NETAPP CONFIG ADVISOR ( Can be installed on Windows Machine ) which checks the hardware status as well as the cabling in your environment.
Config Advisor can be downloaded from mysupport.netapp.com --> Tools --> Utility Toolchest
Your cabling is good and also good to know config advisor showing no errors 🙂 . Please do remember as you have only one controller your setup will be a single point of failure ( As it is a standalone controller ) myself representing NetApp highly recommend using HA-Pair.
**** If my reply helped to solve your issue, please help to mark it as answer to help others ****