tip about using slices

Hi, i’m doing a thesis and i’ studying a micro-sampling of petrous bones. I would like to showcase the sampling compared to the cochlea but i don’t know how to do. Is there someone who can help me?
PM390128_6

In the picture there is the cochlea on the left and there is the sampling on the right (where is the pink line). With the micro-sampling i I should have arrived near the cochlea but it didn’t. So i would like to show this