The LV848170 is a rear top connection accessory for the MasterPact range of breakers. It mounts in the upside position on a fixed drawout chassis, with horizontal orientation and a 115 mm pitch across all 4 poles. This is the exact hardware you need when the panel layout calls for rear cable entry at the top of the breaker.
The 115 mm connection pitch is non-negotiable for lining up with the MasterPact fixed drawout terminal pads. Upside position means the busbars or cables will hook onto the top rear of the breaker frame. Horizontal orientation lets those busbars run sideways into your switchgear bus — typical for top-rear fed panels. No guesswork: if your existing MasterPact has rear top connections, this part number matches.