Replacing cardboards

Andy Drake
 

My roundside pickup has no cardboards installed around the radiator. Sure, I could just hack an old box apart and jam something in there (and the prior owner probably would have), but I picked up a set of premade correct ones at the Nationals this year. Can anyone give a rundown on the installation process? Looked in the manual and I'm not seeing where the whole thing is described. 

Thanks!

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