I have been gathering parts to get the last non-working electrical item on my truck working- the choke warning light. I've got the right choke cable mounted in the sleeve above the ignition, and have a NOS cable mounted choke switch.

The only component I don't have yet is the otter switch. It would seem however that my head is from a later truck (the engine has a tag saying it is a rebuild from '86) and it does not have the spot machined out to hold the otter switch- it isn't blanked out, but just smooth. Other than just grounding out the wire in lieu of the otter switch, is there an alternative location for an otter switch?

Thanks