The best thing you can do is set the trap along trail lines...well, what I mean is, along wall edges, fence lines, garden borders, paths...in general any area where the bunnies would have to pass through or beside to get from one place to another. Imagine you are a rabbit, you will like to lay low, go under stuff, sneak between bushes, follow walls and edges where you feel for secure. You won't be doing much all terrain stuff but mostly trying to find the easiest way to get to food while still feeling hidden. Rabbits LOVE to take trails and paths so those should be the first places your check.
Look for any places in the undergrowth, bushes, or grass that looks like something has been traveling through. If you find a place with little rabbit droppings that should be the first place you set your trap. Set it where it follows with the flow of the area, path, fence, trail, what ever.
The idea is to put the trap where the rabbit will be passing through anyway and the food will only encourage them to not be spooked by the strange metal thing. I encourage you to use bananas for bait, rabbits cannot resist them and they have a strong attractive smell, only put about an inch of banana in the trap, too much will spike their blood sugar. Putting something over the trap, so that it feels like a tunnel that they can walk through will help too. Just make sure what ever you cover it with isn't flappy or shiny. Hay or leaves would be the perfect trap cover.
I speak from experience in the art of bunny trapping.
Just be glad you are only trapping domestic bunnies, wild bunnies take extra precautions with scent and such.