I have 2 EVGA GTX 1080 Ti coolers only (no cards, P/N: 11G-P4-6696-KR) and I'm hoping to use an external RGB controller to power and control the RGB connector.  I plan to just have the coolers on a display shelf and lighting the RGB would be fun (I was able to do this with an RTX 3090 cooler, it's a different connector/pinout though).  Does anyone know the pinout and voltage for these connectors?
 
One connector is 4 pin with a brown cable on the end and the other connector is a 6 pin.  I probably only need to power the top light bar (I'm not sure which connector goes to that).
 
Thanks!
 

 
Example of my 3090 cooler:

 
 
 

Cool GTX
that number = EVGA GeForce GTX 1080 Ti FTW3 GAMING

youtube --->EVGA RTX 3080 Ti FTW3 - onboard 5 pin internal connector pinout for ARGB LED Logo with Corsair iCUE not much in this EVGA Forums ---> 6 pin gtx 1080 ti connector
 
 
Found this is for the 1080 Ti KP .... however, one would think the LED circuit would be similar & should give you some ideas

Look at the end of this great tech guide --> "DIY RGB lights for waterblock setup or casemodding"

xDevs.com | Extreme OC Guide for EVGA GeForce GTX 1080 Ti K|NGP|N Edition graphics card

Good info, thanks!
 
 I was hoping it was easy like on 30 series.  30 series I could just hook those pins to a 5v ARGB header.  This looks like a direct lower voltage connection to the LED's.