Introducing new chickens

Hi, I've got 3 polish hens and today we took delivery of 2 more. So far they are separated in a mini run inside of the bigger run so they can all see eachother but not fight. I have an issue that we only have one coop.

Will I be ok putting the new girls in there overnight, I'm thinking late once the others are asleep and then getting out early to let them out and separate them again? Of the 3 existing hens only 1 actually sleep in the coop as the other 2 prefer the sleeping outside on the roof unless it's mega cold in winter.

I had planned that I'd put them in late and then get up early to separate them but now I'm having a crisis of confidence and am wondering if they'll be likely to fight in the coop over night?

Thanks