I am totally new to older camping stoves, but inherited this beauty. I'm trying to understand what the ends of the hose adapt to? It came with an attachment on the hose that I was able to unscrew (I've attached pictures of what the hose looks like and then what it looks like with the attachment on. Any help would be appreciated! Do I need to find an old primus propane tank in order for this camp stove to work? If I do find one, do they even refill them these days? I just want to make it work - doesn't matter to me if it works with 1L or 20L propane tank! Thanks in advance!