This is not possible, as you have described but is certainly information that you can gather using the existing tools in Simplify3D. You can use a model with the origin in the corner to have a visual indicator of what point is in what position. Then use the model settings panel (double click the model) to lookup the XY position of that model. The top most section displays the X Y and Z offsets for the selected model. These are the offsets from the printer's origin, and should also correspond to the position on the bed.
"A bird does not sing because it has an answer. It sings because it has a song."