Hmm, I just found out what they are for, and maybe I could have plugged them anyway.
There is a switch in there that when cold, directs hotter air through the air filter to assist in start up when it is cold out. It basically opens a flap and draws air from around your exhaust manifold. It helps maintain a regulated intake air temperature.
I saw a thread talking about how you might suffer from having the air temperature so high in the compartment, and sucking it in the engine. I tore off the deflector from the intake between the headlights and rad/a/c evap. With the Idea that more air might be forced in there to be available to the filter. I would like to make a wider collecter to force more air up there, but haven`t got a plan yet. I`m gunna look at it some more.
I must say that the result of going to a cone was a shock! It really gives you more horsepower.