Pickup wire gauge ?

Apologies as I'm sure this must have been answered many times previously but for the life of me I can't find search terms that return a suitable result.

Could somebody please tell me what the OEM Wire Gauge is thats used on the flexible wire connecting the pick up brushes/shoes to the motor terminals, on a standard scalextric car such as the super resistant porsche boxters. As I need to fit a few replacements.

Thanks in advance.