bumper swing out

I have a brand new in the box dual jerry can holder for sale. It fits the standard Nato style jerry cans or plastic Scepter tanks. It loads from the top and you can lock them too. You can bolt it onto a rear bumper or any flat surface really. $220 Los Angeles 91304 Check out the specs here...

Alright, I've searched but my Google-foo isn't as strong as I'd like for this topic. I'm curious, for those of you with rear bumper tire carriers which side is your spare tire mounted on and which way does it swing out? For bonus points, why did you choose that side? I'm leaning towards having...