Not really sure what your asking for. Are you just trying to do AO? Because then you create a mib_amb_occlusion node and connect its out value to the outcolor of the shader.
Ivr covered it in a bit more detail here https://elephantanimations.110mb.com/ao.html

If you want to combine it with a texture of something then you can bake it (cant remember what the option is called but its pretty obvious), this can take a while though and it may seem like maya has crashed when it hasnt