Congratulations on your piggy boars- boars are lovely and cuddly but there are things you need to bear in mind with males.
They'll reach their Terrible Teens about 12 weeks, when they hit maturity. They might get squabbly while they decide who is alpha pig. There's lots of ways to make this transition smooth (and lots of boar threads on here) .
Main thing is SPACE - they need room. I've just had a wander through Gumtree, some of the "huge cages" scarcely have enough room for the pigs to take three steps.
Space out the food- we use big plastic picnic plates for veg and shallow dog bowls for pellets, each with a space for them to walk round. I use water bowls (that they ignored) but I've bought bottles (which is also ignored) but you need to offer water daily.
The one house per pig + a spare works well, and always cut two doors so one pig can't trap the other.
Dried food (I use Burgess Excell is changed each night and always there, as is fresh hay. I find it easier to do this and night time, then supper/breakfast veg)
Your pigs will appreciate a variety of new foods, just offer a small amount of a selection. I give carrot(with leaves) parsley, red/orange/yellow pepper (mine won't eat green), a leaf of cos lettuce or romaine .
So not all salad or all root veg. Fruit yes, but only a small amount. A grape,a strawberry, slice of melon, banana piece.
Brassicas (brocilli,cabbage,kale,cauli) only small amounts, it gives them wind 
Sprouts for Christmas -of course !
You can pick them grass, dandelions leaves, clover until they can go out, (Make sure you build up their grazing time)
And : Food In, Poo Out, these animals poo for Britain.
I got GP3 as a 6 week boar to match with my GP1. There was a transition period where GP3 became Alpha Pig but it was smoothly done.
GP3 did keep trying to bonk GP1 but he got a 
look and GP1 walked away.
GP1 died last week, I cannot feasibly put GP3 (who is a year old and weighs 1350g 
) with a tiny boar. So I'm getting some sows for him. He'll side-by-side until he's been neutered and past his safe period.
He's sleeping in my DD room, just a couple more days alone, then Fingers Crossed he'll have pigs to chat to.
They'll take a while to settle, your boys are in a new home, new sounds. They are prey animals, they never change, no matter how old or how accustomed they become, they always think that they will be somethings lunch. Maybe at night put a cover over their cage (just something lightweight, a sheet or something)
But that's part of their character that makes them gentle , I guess.
Any other queries, just shout out 