I took the front off the e machine w2888 desktop but did not notice the three wires was not one plug, what order and colored wire up or down. Their is a pwr led, pwr s/w, hdd led wire. Thanks Jerry

The eMachines W2888 uses an Intel D845GVSR motherboard.

This is the download page for the Intel D845GVSR motherboard manual, (Product Guide),

http://www.intel.com/support/motherboards/desktop/d845gvsr/sb/cs-008823.htm

Left-click on the first file name in blue -
Intel Desktop Board D845GVSR - Product Guide (PDF)

This is a PDF file. The computer you are using has Adobe Reader on it, which uses PDF files.
After you click on the above file name it may take up to 30 seconds before the first page comes up.
It may also take additional time for the file to fully download.

[ Took 4 seconds to see the first page come up, just now. File was fully downloaded ]

At the top of the PDF file is the page number box. It is to the right of the blue Down Arrow.
This is the page number I will be referring to, and may not be the actual page number of the manual.

Go to Page 11.

This shows an illustration of the motherboard looking down at it from the top.
The letter S points to the Front Panel header.

[The plastic front of your computer is the Front Panel.

The area of pins on the motherboard that the cables (Wires) go to from the Front Panel, is the Front Panel header ]

Looking at the motherboard with the Processor to the top, Ram memory slots to the right, and the white PCI slots (3) to the bottom, the Front Panel header is located parallel to the bottom right edge of the motherboard.

(The illustration has the motherboard sitting on it's right side.
Not the direction it is sitting in your computer.
In your computer the motherboard is sitting as described above )

Now I would like you to go to Page 31.
This illustration shows the various internal headers on the motherboard.
The letter C points to the Front Panel header. (J9G1)

Note that the pins in the Front Panel header are labeled with numbers.
(Pinout)

There are 4 pins across the top.
There are 5 pins across the bottom.

Starting from the Left side of the motherboard, going towards the right, across the Top of the Front Panel header;

Pins 2, 4, 6, and 8.

Starting from the Left side of the motherboard, going towards the right, across the Bottom of the Front Panel header;

Pins 1, 3, 5, 7, and 9

Page 32: Front Panel Header

A) Pins 1 and 3 are for the HarDDrive activity LED light. (HDD LED)
Pin 1 is for the Positive ( + ) wire.

If the LED light is dim when operating, switch the wires around.

B) Pins 5 and 7 are for a Reset switch, IF used.
Pin 5 is for the Ground ( - ) wire.

C) Pin 9 is for a 5 Volt wire. (It's probably Red in color, IF used)

D) Pins 2 and 4 are for the Power On LED light. (Light Emitting Diode)

E) Pins 6 and 8 are for the Power On switch. (The Power On switch is located inside the plastic Power On button assembly)

F) Pin is N/C. Not Connected.

For additional questions please post in a Comment.
Regards,
joecoolvette