Hi,
We’re probably talking here about the round heater that Clayton offers:
http://www.bramclassauto.com/services/products-for-sale/south-wind-gas-heaters/ – They don’t put any connection information on their website.
CTA Sweden offer a different heater – which is sold out – but it would connect the same way and they do show how to connect it – with photos and Swedish captions.
http://www.ctaservice.se/delar/heater/heater.htm
I ‘m expecting Larry to step in here with a plug for the gasoline fired heater.
http://www.bramclassauto.com/services/products-for-sale/south-wind-gas-heaters/
Chris