A two-monitor setup is easier to support when its connections remain understandable after the cables disappear behind the desk. A short connection map records which computer output reaches which screen input and what sits between them. It is useful before cable management, because tidy wiring can otherwise conceal the information needed to diagnose the next failure.
Name endpoints and functions
Give each display a stable physical description such as left landscape screen and right portrait screen. Record its model and selected input. An operating system's temporary display number can change after reconnecting devices, so it should not be the only label used to identify a screen in the physical arrangement.
For each path, write the host port, adapter or dock output, cable and monitor input in order. Distinguish a USB-C host connection from a downstream USB port and identify directional converters explicitly. A note saying connected through the dock is insufficient if the dock exposes several outputs using different functions or supports different modes on different hosts.
Add the intended resolution, refresh rate and extended or mirrored relationship. These settings describe the tested arrangement, not merely the components. A map without modes may explain where a cable goes but fail to explain why a high-refresh change causes the other display to disappear on a shared link.
Label what a later user must recognize
Use removable readable labels appropriate to the cable and environment, placing them where they do not obscure ventilation or connector identification. A label such as right screen DP input is more useful than an unexplained number unless a nearby key explains the number. Keep any power adapter association clear, especially where several similar supplies are present.
Do not include passwords or unnecessary personal information in a shared setup note. Model, port and approved driver information usually provide enough technical context. If the workplace has an asset or support process, place the map where authorized staff can find it rather than creating an undocumented personal record that disappears when someone changes desks.
Before hiding the cables, compare the map with the working equipment. Disconnecting a dock can also disconnect storage or network devices, so include those relevant shared functions in the note. The map should prevent a user from assuming the cable carries video alone when it serves several active tasks.
Update the record after a meaningful change and keep the previous verified arrangement identifiable if rollback is useful. A simple accurate map is better than a detailed diagram that no longer matches the desk. Its purpose is to support decisions: which path to test, which input to select and which component changed when a formerly stable two-screen arrangement begins behaving differently.