Simple remote keymap question

Hi. I’ve bought an RF remote to control KODI on my Raspberry Pi 3. It’s one of these that has normal remote control buttons on one side and a qwerty keyboard on the other. Everything works fine with the exception of the main ‘OK’ button on the ‘normal remote’ side – which is a pain. The ‘Enter’ button on the qwerty side of the remote works just fine though.

I’ve plugged the dongle into my laptop to check it’s not just a hardware fault on the remote and it’s fine – the OK button works.

How can I edit the KODI config file to say “When you hear the ‘OK’ button code, do what the ‘Enter’ button does” ?

Many thanks !