A circuit breaker installation, comprising: a chassis having a first panel defining a first opening and a second panel spaced apart from the first panel, the second panel defining a second opening; a panel interface assembly plate connected to the second panel, the panel interface assembly plate having: a panel plate defining a guide slot, a mating connector assembly extending through the panel plate and including a connector guide pin socket; and a carrier arranged to receive a circuit breaker and a connector assembly connected to the circuit breaker, comprising: a first carrier plate arranged to be connected to the circuit breaker, a second carrier plate extending from the first carrier plate, a bracket connected to the second carrier plate and spaced apart from the first carrier plate, the bracket being arranged to be connected to the connector assembly, and a guide pin extending from at least one of the second carrier plate and the bracket, the guide pin being arranged to be received within the guide slot; wherein the connector assembly includes a connector guide pin that, responsive to the guide pin being received within the guide slot, is aligned with and received in the connector guide pin socket of the mating connector assembly; wherein the panel interface assembly plate further comprises a mounting assembly having: a connector flange plate disposed about the mating connector assembly, and a mounting spring assembly disposed on the connector flange plate; wherein the mounting spring assembly includes: a threaded guide stud extending through the connector flange plate and into the second panel, and a biasing member disposed about the threaded guide stud and extending between the connector flange plate and a retainer disposed about the threaded guide stud; and a circuit breaker power source feed disposed on a second panel plate face of the panel plate and connected to the mating connector assembly. a chassis having a first panel defining a first opening and a second panel spaced apart from the first panel, the second panel defining a second opening; a panel interface assembly plate connected to the second panel, the panel interface assembly plate having: a panel plate defining a guide slot, a mating connector assembly extending through the panel plate and including a connector guide pin socket; and a panel plate defining a guide slot, a mating connector assembly extending through the panel plate and including a connector guide pin socket; and a carrier arranged to receive a circuit breaker and a connector assembly connected to the circuit breaker, comprising: a first carrier plate arranged to be connected to the circuit breaker, a second carrier plate extending from the first carrier plate, a bracket connected to the second carrier plate and spaced apart from the first carrier plate, the bracket being arranged to be connected to the connector assembly, and a guide pin extending from at least one of the second carrier plate and the bracket, the guide pin being arranged to be received within the guide slot; a first carrier plate arranged to be connected to the circuit breaker, a second carrier plate extending from the first carrier plate, a bracket connected to the second carrier plate and spaced apart from the first carrier plate, the bracket being arranged to be connected to the connector assembly, and a guide pin extending from at least one of the second carrier plate and the bracket, the guide pin being arranged to be received within the guide slot; wherein the connector assembly includes a connector guide pin that, responsive to the guide pin being received within the guide slot, is aligned with and received in the connector guide pin socket of the mating connector assembly; wherein the panel interface assembly plate further comprises a mounting assembly having: a connector flange plate disposed about the mating connector assembly, and a mounting spring assembly disposed on the connector flange plate; a connector flange plate disposed about the mating connector assembly, and a mounting spring assembly disposed on the connector flange plate; wherein the mounting spring assembly includes: a threaded guide stud extending through the connector flange plate and into the second panel, and a biasing member disposed about the threaded guide stud and extending between the connector flange plate and a retainer disposed about the threaded guide stud; and a circuit breaker power source feed disposed on a second panel plate face of the panel plate and connected to the mating connector assembly. a threaded guide stud extending through the connector flange plate and into the second panel, and a biasing member disposed about the threaded guide stud and extending between the connector flange plate and a retainer disposed about the threaded guide stud; and a circuit breaker power source feed disposed on a second panel plate face of the panel plate and connected to the mating connector assembly.