Well im still a rookie at this but this is what a node looks like (this one is from the axle of a mt)
73, -2.05, -0.1, -2.02, n
73 is the beam #
-2.05 {X} is how far forward or backward the node is (ex the bigger the number the farther it is away)
-0.1 {Y} is how high the node is (ex the bigger the number the higher/lower it will be[if you have a -sign in front of it it will become negative])
-2.02 {Z} is how much the node is to the ouside (ex the bigger the number the farther the node will stick out the side)
hope this helped somwhat