I have read it and I didn't see it as relevant as I am only looking how to repackage it as an img.
I thought that there may be a way to do it from LE, as I am using an ancient PC with very little space on it. But it may be able to handle something like writing an img file from SD.
I am using LibreELEC-S805.MXQ.arm-184.108.40.206 build on an S805 box and the only thing changed\added is my remote.conf file.
I use RPI Baker but i am on a Mac. Can backup as image file. Sorry i dont use pc
I believe you can create a backup with the remote.conf already installed and it will be in the backup.
When you restore from previous backup (the backup with the remote.conf) it will be working.
Cant help any further.