Precision 3660 adding Sata Drives

I am anxiously awaiting my new 3660.  I ordered it without Sata Drives, just the 2 SSD drives as I have three storage Sata drives from my old box I plan to use for storage.  My old box was home built and definitely legacy built on a LGA1155 Motherboard package and technology has changed somewhat.  I am beginning to realize I am not the expert I once was.  

I just need to know if the Sata data cables and power cables will be there for use or do I need to supply the data cables.  I guess another questions is the Power Supply Modular or do I need to power the extra drives with serial connectors?  All in all I guess I am wondering if I need to be ready with data and/or power cables for the three extra drives I will be adding.  I can’t wait to finally have really really fast email!  Hehe….