Corebox i5 HDD expansion

How to install HDD expansion?
I have SATA wired standard, but I don’t know what power wired I need?

You must have the bundled cable to connect the hard drive to.

Where can I buy it? What is the name or reference of cable?

Probably you can buy it only from chuwi aftersale@chuwi.com

I contact after sales, and other emails, but no body said me where to buy that wired.
I can’t found it searching Internet.
What is the reference?
Chuwi recomends connect SSD as external drive but CoreBox has internal expansion.
Thanks

Something like this, but power connector may be different.