meaning of plural of plural v.s. singular of plural

SovereignSun's explanations are great except this one:

The "Nodes' locations" is wrong. The locations don't belong to the nodes. It should be "Nodes locations".).

The locations do belong to the nodes. The locations are where they are located. The location(s) of the nodes, making them possessive. Both of these are correct: * Nodes' location is given. * Nodes' locations are given.

You need to understand that you can have one or many nodes and one or many locations.

• The location of a node. (one node has one location)
• The location of nodes. (one location for many nodes that are probably in one place)
• The locations of nodes. (many nodes and many locations, but this may note imply that each location can have only one node)
• The locations of a node. (this is doubtly possible in any context except if we are tracing a node)

The "Nodes' locations" is wrong. The locations don't belong to the nodes. It should be "Nodes locations".).