Argentine Rank Insignias - Falklands?

Hello all, I am gathering surplus items to put together an Argentine Marine/Army outfit of the Falklands War in 1982, and I wanted to add a little bit of decoration in the form of a rank patch to the otherwise bland OD. However, I cannot find any resources referring to them, and the only information I can infer is that they are red chevrons placed on the chest on the left. Does anyone know what rank corresponds to what number of chevrons, or really any other information regarding Argentine insignias? Any help would be greatly appreciated, especially as I have almost completed the whole thing.