2016 Grizz SE frame question

I am a new member here and new Grizz owner as well. I was adding Ricochet skid plates to my ride when I notice when bolting up the rear skid plate that the 2 back bottom frame rails did not have end caps on them and were just open where water and debris could enter …. Is this normal on these bikes … I had a Brute Force prior to this and they were sealed. Any input would be greatly appreciated.

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