Help! With psu cables

[Cramer12]

Hello, I hav a Dell XPS 720 and me, being an idiot did not even think of remembering where my psu cables went into the mobo. I have a usb (power?) cable. I already read the users manual multiple times (only got the 24 pin and 20 pin in) and still cant figure it out. if anyone could make a diagram for me or help me put my cables where they need to be that would be greatly appreciated.
Thanks.

 

[UmarMahar]

Could you please describe your problem more in-depth

 

[PsyKhiqZero]

motherboard power
20 or 24 pin connector. Usually on the right side of the motherboard.
Cpu power
4 or 8 connector. It will either be a solid 8 pin or split into 4 and 4. It usually is in the upper left portion of the motherboard.

Gpu connectors
Either a solid 6, 8, 6+2 or none at all.

Sata power thin L shaped connector goes to each hdd and dvd rom

 

[Cramer12]

I dont know where to plug my psu cables in to my mobo, I have the users manual but it doesnt help much, the only plugs i got in successfuly are the 24 and 20 pin, but i still have a few more cables on my psu that I think I need to plug in. My psu is the Dell MG309 and comes with:

(1) 24-pin ATX Connector
(1) 20-pin ATX Connector
(1) 6-Pin Dell Proprietery Connector
(2) 6-pin PCI-E Connectors
(2) IDE Connectors
(6) SATA Power Connectors
I dont know where the proprietary connector goes or the IDE connecter and I also have a double ended usb power cord?
Here is the users manual
http://downloads.dell.com/manuals/all-products/esuprt_desktop/esuprt_xps_desktop/xps-720_owner%27s%20manual_en-us.pdf

 

[Cramer12]

"motherboard power
20 or 24 pin connector. Usually on the right side of the motherboard.
Cpu power
4 or 8 connector. It will either be a solid 8 pin or split into 4 and 4. It usually is in the upper left portion of the motherboard"

I have a 24 and a 20 pin on my mobo it is a btx mobo.