MXIII always had S802 soc.
Yours may be a MXIII Plus if it has S812.
I have a MXIII 1GB and a MXIII 2GB but not a MXIII Plus.
If yours is a MXIII Plus, then
the starting point would be Drieschel's S8X2 build
Unzip it to empty microsd and use the toothpick method
The endpoint for you would be
LibreELEC-S8X2.arm-8.0.1-M8S.tar (I think)
Edit: I thought wrong, correction as per Demetris - LibreELEC-S8X2.arm-8.0.1-MXIII-PLUS.tar
The remote.conf file is in your /etc folder in Android. You need a root explorer to access that file on your kitkat install. This needs to be copied to the ConfigFiles smb share or /storage/.config folder if doing over sftp/scp or using pendrive
Got it working, thanks for the information you were right my MXIII 2G is S802 Soc the MXIII Plus didnt work but the MXIII1G.tar file worked beautifully. Big Shout out to Drieschel and Demetris for putting in the time creating these builds so I can keep my box up to date.
I am using an aftermarket remote/keyboard usb remote, My only issue i have is my back button doesn't work on remote end just keyboard side del button works as back. but most Important my menu button (Right Click) doesn't work either. I added the remote.config to the ConfigFiles but My back button and menu still don't work any help on this would be greatly appreciated.
Also by buddy has an MXq box with file would i use for that one I believe its a S805 soc.
Thanks again for all the help greatly appreciated.