Correctly plug ESP power

[vexe]

Hello, I've been building new PC and I have a problem, Im not entirely sure if this cable(http://postimg.org/image/y4nlodf2f/20b1e9b6/) is for CPU power. Should it go in 10 pin psu connector called p8/p4 or not and why is there 10pin if it can power max 8pins?

 

[MagnusTheBrewer]

Please read your manual.

 

[sm625]

A 10 pin connector like that usually plugs into the power supply. Is your power supply modular? ie does it have cables coming out the back or does it have connectors as shown below?