47-53 Grill Bar Identification and locations

[steve aleve]

Can anyone help me? I bought a 47-53 1/2 ton grill that is missing one bar. I know these bars are not interchangeable and have notches on the back (1-5) there is also an indent on one for a ?? Can anyone post some information on if the bars are notched 1-5 top to bottom (1 = top) or 1-5 bottom to top (1 = bottom). Also which bar has the larger indent on it and are there any other differences between bars? Are all three vertical bars the same or different as well? I am trying to figure out if I bought a hodgepodge of stuff or if it is close to complete.

Thanks!