1. An illumination system for use with an occupant monitoring system (OMS) for monitoring at least one occupant in a vehicle, the vehicle having a steering wheel assembly configure to rotate relative to a steering column, the illumination system comprising: an infrared light source coupled to a central portion of the steering wheel assembly, the infrared light source directing infrared light within an imaging area of an occupant monitoring system (OMS), wherein the central portion of the steering wheel assembly comprises a hub and spokes, wherein the spokes extend between the hub and a rim of the steering wheel assembly.