How to charge OKICA card in Nago?

Hi all

I'm in Naha and going to go to Nago for a while, I've been using the OKICA card to catch all the buses. However I can't find any info on the website about a machine in Nago I can charge my card. The nearest I can find is arund Chatan. Does anyone know of any? I think I can maybe also charge on any bus but I'm not sure. https://info.okica.jp/use.html#charge_machine

Any suggestions greatly appreciated 🙂