Access folder sys:system to load .nlm

Dear,

I installed a BO vers 2.0.5. I would like to install remotely the Adrem
(afreecon.nlm) to check the server. Unfortunately I can't access with
remote supervisor right the sys:system folder to load and add the .nlm.

How can I add without any support on site the Adrem application ?

Many thanks for all you help
Boris