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It would be an iMac 27 5k 2019 purchased in a CTO configuration. It comes pre-ordered with a 2TB Blade SSD from Apple and therefore does not include an HDD (Fusion drive). My question would be if I buy a SATA SSD installation kit. will my HDD Data and Power Cable be included in my iMac? If not, what cable can I replace? 

( There would be a cable detailed on page 88 of the Repair Guide PDF. ***``Service Manual - iMac 5K 27-in (2019).pdf ) 

The end result would be to have one Blade SSD and one SATA SSD in my iMac. 

Thanks for everyone’s help.

Apple does not install the SATA / Power cable 923-00664 when you get a blade SSD model you’ll need to buy it if you are adding a SATA drive (HDD or SSD). Here’s the location of the connections, the Orange marked is the data and the Red marked is the power