IF the smarter people your instructing get a good grasp on the basic concepts of diagnostics, restoration,
and tuning, and electrical component repair & restoration,
they can make a good living in a job where the more skilled members are in demand,
perhaps you could suggest, that modifying the current wiring or using it as a rough guide to fabricate a similar but much superior,custom auto wire loom,
might not be all that difficult too do?as a learning exorcise?
making a custom mod or repair, shows skill and ingenuity.
(in fact its almost a mandatory skill in auto restoration and custom hot rod and race car fabrication.)
certainly its a skill set that will prove very useful and almost mandatory if they choose to become involved in auto repair work!
I well remember having to re-wire a friends 1966 chevelle after he had a nasty engine fire, and learning to use heat shrink tubing and correctly solder
pig tail connectors into the wiring loom certainly was not the last time I needed to do wire and connector repair work. or use a multi-meter.
you may mention that good auto wiring techs, with skills,
make good pay and are ALWAYS in demand and seldom have issues finding a job.
as always knowing a bit more than the next applicant , having a positive attitude ,
and being able too work with customers and promote sales and services can greatly increase take home pay.
even a basic wire tech can make a living,
but with a few added skills that pay check can rather easily double,
$50-$70K for a skilled tech is rather common
https://www.keepitcleanwiring.com/
http://www.haywireinc.com/
https://www.ronfrancis.com/
https://www.painlessperformance.com/custom/
https://www.ziprecruiter.com/Salaries/Automotive-Diagnostic-Technician-Salary
https://www.glassdoor.com/Salaries/automotive-wiring-technician-salary-SRCH_KO0,28.htm
https://www.ziprecruiter.com/Jobs/Car-Tuning
https://www.payscale.com/research/US/Job=Automotive_Diagnostic_Technician/Hourly_Rate