Uses the same SSD cable as the previous generations of 21.5” iMac . No additional temp sensors necessary as far as I know. Since you have an SSD only model, you may also need the 2.5” hard drive brackets for optimal mounting, since your unit likely doesn’t have them. It’s not as necessary with an SSD since no need to mitigate vibration, but I am always less than enthusiastic about leaving SSDs dangling on cables or taped into enclosures.
iMac 21.5" (Late 2013-2017) SATA Cable
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