Survival cache 1
Starting with the Remnant Bazaar, walk over to its South-Western part and find the tent at the edge of the location, at the wall. The cache is to its right, in a straight line from the tent entrance.
Survival cache 2
from Remnant Bazaar, walk Northwards a bit, at the tree, on the projecting ledge, you find the cache.
Survival cache 3
From Tower Courtyard, return a bit, deeper into the location. On the right, there are alleyways and at the end of one of them, there is the cache by the pile of stones.