Base is MachineModeling.Connections.Base:
    .doc: """
    Internal connection for undercarriage to
    connect chassis to the bogie.
    For an articulated chassis each of the frames
    must have one connections each.
    """

    chassis is MachineModeling.Components.Primitive.Base with Bulldozer.Interfaces.Chassis.BaseConnectors reference
    left_bogie is MachineModeling.Components.Primitive.Base with Bulldozer.Interfaces.Bogies.BaseConnectors reference
    right_bogie is MachineModeling.Components.Primitive.Base with Bulldozer.Interfaces.Bogies.BaseConnectors reference

    left_bogie_connection is MachineModeling.Connections.Base

    right_bogie_connection is MachineModeling.Connections.Base
