There are two types of gas bayonet fitting, male and female gas bayonet. For the female gas bayonet, the wall socket fitting attaches to the gas supply line that is fixed to the wall or the floor. However, the male one forms a connection by forcing it into the locking lugs aligned to the engagement slot. Lastly, twist it clockwise to fix it. However, it is better to hire a professional gas fitter than doing it at home for safety purposes.