So I got an Sli bridge for cheap with a purchase from a fellow Evga member. Then I saw his post about changing the color of the lights. Well, those of us without 700 series cards would also like lights to work! I got to thinking and came up with this.
 
Tailed wire or any other color for sale at same location or other favorite retailer.
 
I TAKE NO RESPONSIBILITY FOR YOUR OUTCOME FROM FOLLOWING THIS GUIDE.
 
USE AT YOUR OWN RISK
 
Step 1 : Take out 2 screws on back of Sli bridge.
Step 2 : Make a small notch in platic Sli casing, big enough for wire to pass through without cutting it.
Step 3 : Insert led behind "EVGA" logo with wire running through notch and reinstall Sli bridge and 2 screws.
Step 4 : Plug into motherboard and reinstall onto video cards.
Step 5 : Enjoy!
 
 
Results:
 

Nice.  Well done.  I've been thinking about picking up one of these bridges (I run 580's) but have been hesitant because of the bridge not lighting up.  Problem solved!  Thanks for sharing. 

Awesome my 2way bridge arrived today I run 2x 660 ti's in sli..saw another mod but this one is much better!!! THANKS gonna get this thing lit up..sucks it wont light up PERIOD! as it should

Nice job, looks pretty sick with the green color scheme

I know pics arent the best going to get better ones up.. not to bad think Im going to try find brighter led light not as bright as it appears in person..or maybe its just me
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if you can find out what two pins control the LED lighting, you may be able to solder in a power connection and light it up that way as well. dont know if that would cause a back feed effect on the GPU though.

ah say the blind man  switch out led for these and have control