** Doh! I missed there was a "P" on the second map. You're the "P" in the first ma, in the middle on the east side.
If you put the second map below the first, there's only one place you can go, the unexplored passage to the south on the west side. However, there's two ways to get there from where you currently are: Go north out of the room, west past the smithy where you freed Gareth, take the first south corridor, go all the way south until you get to the door in the west wall, and go through it to the west and then south to the unexplored area.
Or you can go past the smithy and past the first south corridor and go to the second and turn south, where you pass the arena to the west where you fought the wolves, and go all the way south through the door to the unexplored area.
If you put the second map below the first, there's only one place you can go, the unexplored passage to the south on the west side. However, there's two ways to get there from where you currently are: Go north out of the room, west past the smithy where you freed Gareth, take the first south corridor, go all the way south until you get to the door in the west wall, and go through it to the west and then south to the unexplored area.
Or you can go past the smithy and past the first south corridor and go to the second and turn south, where you pass the arena to the west where you fought the wolves, and go all the way south through the door to the unexplored area.