hp xw6200 Win 7 Pro 54 bit 2nd SATA hard drive connection

Hello :)

I wish to connect a second hard drive to my XW6200. Last Tuesday a friend gave me the connection procedure:

"The hp manual shows you can have 2 Serial ATA Sata drives. See the manual.
Refer to pg 69 item 19 and 20 for the Sata data headers. Refer to pg 100
for the hard drive bay.
The PSU has 2 Sata power leads, so all you need is a Sata data lead.
Just mimic the existing lead."

Unfortunately, when I tried to put this into practice, I discovered that SATA item # 19 was being used by my CD/DVD drive
( It might be item # 20, I'm no longer sure). I would like to know what options I have now.

Would you recommend my adding a new PCI SATA add-on card?
Thank you very much for your help.

All the best,

Boyard

Good afternoon, Sub Styler

Thank you very much for your suggestion. I will use the adapter solution.
You have made my day!

All the best,

Boyard