Which network fabric connects directly to the chassis midplane?

A technician replaces a failed Management Module in an MX7000 chassis group. After the technician leaves the site, the administrator reports that the lead chassis is no longer able to communicate with its members.
How can OME-M be used to confirm the cabling configuration?

Which uplink configuration combination of the Top of the Rack Switch and the MX7000 Management Module is supported?

A systems administrator must extract log files from an MX7000. The logs cannot be saved locally and must only be stored on a secure file server.
Which share protocols can they use to save the logs?

While servicing an MX7000 chassis a system administrator logs into OME-M and receives a Chassis Mismatch error.
What should be the next step taken by the administrator?