What rear cage extension w/spare tire mount do I have?

I just purchased my 2012 xp 4 900 and it already had some additions. Can you tell if the rear cage is polaris? Here is what I am trying to accomplish:
I purchased new 14" STI wheels and because the wheel has a larger 4" opening it will no longer mount to the spare carrier. the vehicle is registered so I need to keep the view clear. Also, I would like a Lock & Ride as well as a small yeti cooler so I need to see if they will fit (and open) with my cage and spare. any suggestions or photos will be appreciated.

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