The writing is complex chinese so Taiwan or Hong Kong?
The customer is correct. You need patch panel (OJ as they call it). It's not a good idea to terminate the fiber directly.
As other stated, local contractor typically installed the fiber between the patch panel. However, there are pre-terminated fiber you can buy now. You could just buy that and sent with the project plus the fiber patch panel.
https://www.blackbox.com/en-us/solu...ure/pre-terminated-fiber-optic-cable-assembly
If you provide the cables, just be sure all the connector works from end to end.
Typical fiber cable are anywhere from 6 pairs (12 fibers) and up, so you would hook up fiber fiber from patch panel to patch panel then hook up devices using patch cable.