A processing device for an industrial vehicle, comprising: a main module (204, 304) having: a main module circuit board comprising: main module circuitry including a processor that is communicably coupled to memory and input/output circuitry, the processor configured to read instructions from the memory to execute vehicle-specific processing; and the main module circuit board comprises a rigid main-side coupler electrically connected to the main module circuitry, and the processing device further comprises: a service module that defines a graphical user interface having: a display; a control area having a user input control; and a service module circuit board comprising: interface circuitry communicably coupled to the display and the user input control; and a rigid service-side coupler electrically connected to the interface circuitry; wherein: the rigid service-side coupler aligns with and electrically connects to the rigid main-side coupler when the service module is attached to the main module (204, 304); the service module connects to the main module (204, 304) by a temporary securement facilitating field replacement of the service module to the main module; characterized in that said temporary securement comprises: a first anti-vibration post that extends a gap between the main module circuit board and the service module circuit board when the main module (204, 304) has been mated with the service module; and when the main module (204; 304) has been mated with the service module, a first screw fastens to the first anti-vibration post to thereby secure the main module circuit board relative to the service module circuit board and dampen vibration of the electrical connection between the rigid service-side coupler and the rigid main-side coupler. a main module (204, 304) having: a main module circuit board comprising: main module circuitry including a processor that is communicably coupled to memory and input/output circuitry, the processor configured to read instructions from the memory to execute vehicle-specific processing; and the main module circuit board comprises a rigid main-side coupler electrically connected to the main module circuitry, and the processing device further comprises: a service module that defines a graphical user interface having: a display; a control area having a user input control; and a service module circuit board comprising: interface circuitry communicably coupled to the display and the user input control; and a rigid service-side coupler electrically connected to the interface circuitry; a display; a control area having a user input control; and a service module circuit board comprising: interface circuitry communicably coupled to the display and the user input control; and a rigid service-side coupler electrically connected to the interface circuitry; interface circuitry communicably coupled to the display and the user input control; and a rigid service-side coupler electrically connected to the interface circuitry; wherein: the rigid service-side coupler aligns with and electrically connects to the rigid main-side coupler when the service module is attached to the main module (204, 304); the service module connects to the main module (204, 304) by a temporary securement facilitating field replacement of the service module to the main module; characterized in that said temporary securement comprises: a first anti-vibration post that extends a gap between the main module circuit board and the service module circuit board when the main module (204, 304) has been mated with the service module; and when the main module (204; 304) has been mated with the service module, a first screw fastens to the first anti-vibration post to thereby secure the main module circuit board relative to the service module circuit board and dampen vibration of the electrical connection between the rigid service-side coupler and the rigid main-side coupler. the rigid service-side coupler aligns with and electrically connects to the rigid main-side coupler when the service module is attached to the main module (204, 304); the service module connects to the main module (204, 304) by a temporary securement facilitating field replacement of the service module to the main module; characterized in that said temporary securement comprises: a first anti-vibration post that extends a gap between the main module circuit board and the service module circuit board when the main module (204, 304) has been mated with the service module; and when the main module (204; 304) has been mated with the service module, a first screw fastens to the first anti-vibration post to thereby secure the main module circuit board relative to the service module circuit board and dampen vibration of the electrical connection between the rigid service-side coupler and the rigid main-side coupler.