I have 2 Bennett 371's. Neither one has an external light switch.I believe it was inside on the light manifold conduit. You had to open access door to turn the switch on. The last one I restored I just put my own roll switch in a junction block in the light conduit coming down from the light manifold about even with the access door. The conduit in on the opposite side of access door but it easy to reach across to turn it on.