mibs

Hello!
At Observium I am managing a considerable number of devices, including pfsense, huawei, redhat, linux, ubuntu, and Lenovo computers.
However I do not have relevant data for Lenovo, the Mibs that arrive are very few that does not show me performance levels of CPU, RAM & STORAGE.
They can help me and / or guide me to be able to install the MIBS of which I already have the file corresponding to the Lenovo computer model.
I would be very grateful if you help me with this issue.