Four piece kick panel insulation set

[bull]

Ok, so there are two piece sets and four piece sets and since they're about the same price I got a four piecer. But I'm not too sure where the other two pieces are supposed to go. I assume they go in the area near the kick panel. Little help?

[Alaskan_TA]

The other two mate to the firewall at the sides. 1970 Challenger shown here;

[bull]

Thank you. My guess was that the yellow side would have gone against the metal but I guessed wrong.

So were they glued to the firewall, like with 3M spray adhesive?