Yes I know what he is talking about.All Model 4's and 5's had these at the front and the back.As far as I know they where just there for drain holes.For say you washed it or you spilled fuel over it.Not sure if there was any other use for them,but every model 4 & 5's had them.Sorry can't shed any more light on it than that as I don't know any more on them.If I do find out I will let you all know.I will do some digging around,I'm sure there would be some other reason.
