[Q] How to know correct .KDZ for A6RE D855 topic

Hello guys,

Im currently on LG G3 D855 A6RE. I'm using Lollipop and I'd like to downgrade it to Kikat.
What I need to know the correct Firmware for A6RE D855.

My current software version is V20e-AME-XX

Please help!.

Thanks!