[9.5.3] Ability to attach computer items to a plug (PDU)

I discover the integration of the "racks" plugin in the GLPI core, excellent work.

I added my PDUs in the racks (on the right and on the left), I defined the number of socket per PDU but I do not find the possibility to say my computer "XX-XXXX" is plugged on the plug 6 of my PDU "xxxx".

Maybe the option exists but I can't find it .... I am searching like crazy.

Thank you in advance for your help.