You can get a SATA power splitter 0N701D to use with your existing 15-pin connector.   Picture and similar discussion here. It may be too late for you to edit your post, but you can request Mods to remove the service tag as it is considered private information.
Hello, I've an dell precision T1700 SFF desktop and I would like to add an second SSD, but it seems the mother board did have only one 6 PIN (2x3) power connector which is already connected by power cable with serial (DP/N 07GyGG), this cable has 15 pin connector, connected by SSD.I was looking for Y cable with 6 PIN x 2 15 PIN connector, so that I can add a second SSD, but I couldn't find anywhere Can anyone please help here to locate that part? the warranty was expired I just need help to find out Y cable compatible with this mother board, Please help  
Y cable to add second SSD on Dell Precision T1700 SFF