If you mean between the emblem and the paint, nope, not necessary. I assume that's what you mean, because if you don't put the nuts behind them, they will fall out.
Rensselaer! Grew up in Hobart, but drove thru Rensselaer often on ol hwy 114 I think it was! Good friend of mine got in a terrible accident on that little road a couple yrs ago. Good to see another hoosier on here! I'm still one at heart.