AD Store not on C-drive

I'm using OpManager Enterprise 6.0 build 6002.

I've added two domain controller to monitor, but the Active Directory store is not stored on de C-drive.
The store is installed on d:\winnt\ntds\ntds.dit

I changed the Database Monitors -> Database Size monitor to look at the file on the d-drive. That works.

But in the dashboard there's also information about the free and total disk size. But this information is still from the C drive (Stated above the data)

I don't have the option to change these two monitors to look at a different drive.

Anyone an idea how to solve/adjust this in our monitoring application ?

Thanks.