Chicks on order...now what??

I've reserved 2 bluebell chicks, aged 6 weeks, to be collected this weekend  I've been informed they're on growers pellets, have been vaccinated and can live outside if I so wish. So now what??
I have a large indoor rabbit hutch for them to reside in for now, growers pellets, chick drinker. How do I go about moving them outside and introducing them to my ex-batts, and at what age should I do this??
Looking forward to my first step into chick rearing, there's just so much conflicting info on the web, it's difficult to know whats what xxx

Its more of a cage than a hutch, so I couldnt felt it, it has a plastic bottom and a wire top. I could place the whole cage inside the chicken run during the day, the chicks would be safe and still be able to see the ex-batts. I could also fence off a bit of the run for the chicks and let them out to scratch about. Would it be ok to move the rabbit cage into the shed overnight? What age do I let them physically meet the ex-batts?

Thanks Joyfull. They can have thier own coop and run next to the girls and they can all learn to love one another