Not sure if this link works.
https://static.gigabyte.com/Product/2/6633/2018070514384478_src.png
To plug the RGB fans in you can use the D_LED1 or D_LED2, these are 3 pin but 4 wide as there is a gap. They are labelled V,D,gap,G but this does not control the colour, just stays the same. (Or at...