2015 rzr 900 4 rear roll cage extensions

Looking for some info/ideas pertaining to the bolt on oem rear roll cage extensions on my 2015 rzr 900 4. I was wondering if they could simply be removed or do they actually support the frame or the main cage with everyday riding (not a rollover). I like the look but would really like to have full access to the cargo area. Any info or pics of refab work would be great..