Ugoos UR02 remote to Amb6+ (set Flash folder to writeable)?

Hi,

I would like to add the UR02 remote to Coreelec on my Amb6+.

However I need to set the flash folder to writeable first to copy the remote2.conf file.
Simply copying the remote2.conf file does not work since the flash folder isdt set to read only.

How do I change this in putty?
What commands exactly do I have to use in putty to make the flash folder writeable?
Many thanks.

make it writeable:
mount -o remount,rw /flash

make it read-only again:
mount -o remount,ro /flash

make the cfg update without reboot
remotecfg /flash/remote2.conf

Thanks a lot.