Looks like a barb end, so assuming you already have an oxy hose, you'll just need a small hose clamp. If your hose still has the end fitting, just cut it off. And just a tip- a
little bit of spit on the barb will aid greatly in getting the hose on the barb. But don't forget to slide the clamp on the hose first!!
https://www.google.com/search?q=smal...w=1600&bih=758