When I accidentally depleted our car battery, I charged it's battery from the inside outlets, using a 0-30V 0-10A bench power supply device.

The car has 3 outlets. One individual outlet is rated for 10A, while the combined current is rated at 16 A.

I increased the current, but when I approached 8A, there was a smell of hot copper wire. I immediately decreased the current. At 7A, everything worked fine. And the outlets still work as intended. But I am worried, so I am asking here:

• Is it safe to keep using that outlet?
• Is there any possible damage?
• If there is damage, how to locate it?
• If there is damage, how to repair it safely? (replace the entire wire.)