I purchased an R Tech welder a few days ago. It has the original regulator etc.
Today I bought a bottle of gas but the fittings are both the same as in both are males???? What am I missing???
Doesn't look like you're missing anything as such. Maybe someone will know of a suitable adaptor. Not all regs are the same and neither are the cylinder valves e.g. BOC argoshield needs a different type of reg to Air Products ferromax despite the gasses bring similar. Your best bet is to take your regulator to the gas supplier.