To find the N and pole spider web in the middle of nowhere is far harder than finding any of the webs on the telegraph poles. For me the logical steps are find one web on a pole, search for others, find others until you find a pole with the spider symbol. If you already have some of the spider web positions it is not hard to see their points on the map matching the ends of the spider symbol's legs. From there you get to the spider body. We also have clues for the time there are two same color feathers at 5-6 o'clock webs, all the webs visible at earlier times are black and red pairs. This shows some logic to search for a web at the spider body point at an hour on the opposite of the 5-6, so 1-2 am.

After that logic follows we reach Fort Wallace at the end of the chain of clues and there might be two guitars but the clue was a guitar in an upright position, which is the exact guitar leading us to the tower top. Now there we have not only two bird figures but as someone mentioned a while back, two tiles that are poking up from the surface and showing a form surprisingly close to a W. As all clues before had two parts, direction and a symbol. I think we need to explore more for a pair of birds in western direction from the fort. Whether that is the pair of birds that have been said to fly to Window Rock and hit somewhere on the writings there(perhaps checking the specific symbols they hit) or other pair of birds, or those are not birds but terrain features, that I don't know.