I can only speak to what works for me, but from the pic it looks like the levers themselves (relative to the ground) are about right. However, the bar looks like it is tilted back farther than I like. I like the ramps level with the ground.
So if it were me I would tilt the bars down a tad, which will means sliding the lever up a tad to compensate.
But really this is all personal preference. You will see a lot of different setups out there.