The mechanics at the shop have to be inventive and creative because resources are limited. Sometimes, they have to fabricate their own parts!
And instead of security cameras, there is a big window that lets MJ's Mom see everything that goes on in the shop from the office/store.
Sometimes, business is dealt in the privacy of the deeper niches of the shop.
Niches where little chickens were hatched by light bulb incubation.
Niches where green bananas are ripened by the heat of the machines.
This is a thread maker, and according to MJ's Dad, is currently not working. Hmph, so much for my theory about the banana ripening niche.
But as talented and ingenious as MJ's Dad is, somehow he'll make the whole thing work again with the use of these gadgets... watchamacallits.
"Yeah," MJ's Mom said. "This old broken generator will rise from its steely death one day."
That's the kind of magic that MJ's Dad can do in his auto shop.