We have a number of rack mount kit options that will fit the Gen 7 TZ570 & TZ 670, and also the Gen 6 TZ350, TZ400, TZ500 & TZ600, as well as some older products. There is no rackmount available for the SOHO model, and the larger NSA models are standard 19" rack-mountable and do not need a separate kit.
Most of the current mounting kits now include front facing network ports with short cables connecting into the rear of the firewall. There is also a place to secure the external firewall power supply.
For some of the firewalls there's an option for either the official SonicWall mount kit, or the 3rd-Party version. Please check your requirements.