Component Placement Volvo Bus Corporation Note: The table includes components that the vehicle is not equipped with. More adapters than those stated can fit the connector pieces. See also, 300, Component placement, Description, Design and function The reader is advised that printed copies are uncontrolled. 55 U23 88890094 1 – 21 U24 88890094 1 – 21 Y54 88890053 1 – 7