Yes, but if you want to sparge, you'll need your second pot to heat the sparge water.
What I was suggesting is draining into a bucket or something, heat sparge water in your second kettle, add that to the tun as sparge water, drain (add) that running to your wort already collected, pour all that back into the boil pot for the boil process.
Keg #1: Brown Bomber Bourbon/Oak Vanilla Porter
Keg #3 The Bollocks ESB
Fermenter: Lawnmower APA
Bottled: Mjolnir Mead, Lazy Daze Hefe.