Add a value between -1.0 and +1.0 to the final calculation of the "tlc_" variables (="Top Left Corner").
For the X value negative values moves the view left (so the object appears further to the right in the view) so I think that's what you want to do, for the Y value negative values moves the view up (so the objects appears further down).
I'm not sure what will look right so you might need to try different values, but I think -0.35 for the X coordinate and +0.15 for the Y coordinate will be a good starting point with the screen size you're using.