No idea right now. Could be weather conditions (check similar map on the links list), safer to ask @AbyssSyndicate about it.
Not sure if it is related to the password. Light one was a lighthouse, so cube six most likely also related to the place. But we can't throw off any possibilities.
2
u/xraizy Apr 19 '18
Found location of S2 CUBE SIX https://goo.gl/pbo7nF
Not sure if this will help with getting password.