Simply place the 9 tiles together in a 3 x 3 square so that each edge perfectly matches the edge of the adjacent tile.
Each tile is designated A1, A2, A3, B1....C3 etc.
When you have all the tiles in the right place, and orientation, the cache can be found at:
41° (A2) (B2-2) . (C2) (B3-6) (B1) 81° (A3-7) (A1-1) . (C3) (C1) (B2-2)
GC1BJ8Z provided the inspiration for this puzzle cache.
TIP: You can distinguish tile 6 from tile 9 since the digit 9 is not centered in the tile.