33 Dash Gage Panel

[STAN WHITE]

I have a 33 Dash and I have the Bezel. I am going to use Stewart Warner Winged Gages. I will Engine Turn my own Panel. My question is how does it attach, There is the four tabs for the Bezel two on top and two on the bottom of the dash panel opening. There is also two tabs on the left and right side of the opening. Are these to attach the gage panel?. Does anyone know the thickness that the gage panel should be, Thanks for any help. Stan