What is the most efficient way to build a LAN scheme (from unmanaged switches)?

Question

Computer networks

There is a local network for several dozen computers, built a long time ago (the previous admin did not leave the scheme, etc.). A router for accessing the Internet, a switch is connected to it, several more (all switches are unmanaged) - there are no questions with this, links from them directly to devices or to ethernet sockets. With the exception of a simple poke, how can you understand what belongs to which port? And mark/replace links accordingly.

Answer 1

There are devices for radio calls, at the desired point the cable is contactless.
The second way is according to the footage marks on the cable.

Answer 2

Find/buy/borrow a managed one and draw up a scheme using poppy addresses.