Well, my 2 cents...
First: Start with a very small space. The cage for a week or so, and increase their range gradually, that's how they learn what's their safe base. Imho they should have a hiding box in there. If they have the tendency to bolt, and the space, they will bolt. They do not learn anything while running away and hiding.
Time is essential, patience and repetition. Spend as much time as possible very close to them, beside their hutch and later inside their run, give them treats now and then (always combined with a acustic reference, I smack "ts-ts", works great for calling them. Read a book inside their area, maybe even take some blankets and sleep there on the ground, so they can check you out, get used to your presence. Ignore most of what they are doing then, unless it's an opportunity to give them a nose rub or a treat for coming close.
Never ever get frustrated, never act in anger, stay calm, never catch them unless it is something they can handle. Try to give a nose rub and ear base tickle whenever feasable, but act indifferent if they show any sign they are going to bolt. It takes time.
A week ago I took in a foster dog from a friend who is in hospital, and my free range house bunny Herr Hase wasn't very thrilled about her, but patience, repetition and avoiding any escalating does the job.
Most of all, be confident in what you do. Animals are very good in taking up the vibes, if they feel you're unsure they will exploit that, or adopt that attitude - if you are nervous, they will be too. (I'm not sure all I wrote makes much sense in english:roll
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There are skittish rabbits that will never ever be managable, I have those pop up now and then in my litters - they definitly taste better than the others, would never sell one of those as pet or breeding stock. But they are rare (in my stock), and I don't think you've got one of them.
That talk about them being prey animals, well, it's basically true, but rabbits are really really great when it comes to decide what a real danger is and what not. Sudden movements though are better be avoided. Thunderstorms, fireworks, hammer, road noise, chainsaw (sic!) - about everything, they learn quickly that it's no danger and ignore it. Same is true for a friendly dog in their living space. Although they are prey animals, they are happy with mostly everything they have a chance to get used to.
That takes some time, whatever it is. And repitition. And ignoring any frightened behaviour. Act as an example.