copy rc_maps.cfg to /storage/.config, my_remote to /storage/.config/rc_keymaps by ssh then restart box.
commands:
scp ~/rc_maps.cfg root@BOX_IP_ADDRESS:/storage/.config
scp ~/my_remote root@BOX_IP_ADDRESS:/storage/.config/rc_keymaps
One question. Where are you download firmware LibreELEC-RK322x.arm-9.2-devel-20200427213549-b7186bc-rk3228b-v88marsII.img. gz? My firmware is LibreELEC-RK322x.arm-9.2-devel-20200114140204-0bca75f-rk3228b-v88marsII.img.gz, don't work power on by remote....