Removing the air deflector panel was a serious P-I-T-A!

I have the SLP CAI. The instructions say to not only trim the bottom air lid but ALSO, to trim the air deflector panel!?!?......

I would think the SLP stainless air duct would go in without the air deflector panel. I've already accidently ripped the top of the air deflector panel off while pulling it out!! I can't imagine putting it back in the bottom holes again! Do I still need to cut the plastic/rubber air baffle when installing a CAI?

I'm somewhat confused and would appreciate any help.

Thanks a bunch