Where are the power, ground and LED connections on this car air conditioning PCB?
That's not how auto repair is done.
The key is the wiring harness.  A lot of electronics people treat the harness as &quot;just nothing&quot;, because it's &quot;only wires&quot;... but you want a reliable car, yes? Getting harnesses right is actually kind of hard. There's a lot to making harnesses reliable.
The gold-standard solution here is to go to a junkyard and get that entire wiring harness.  It probably contains 4-12 plugs and all the interconnecting wires.  Then you unplug all the plugs on your car, remove cable clamps and remove the harness carefully, removing components which may be in the way.   Then you swap in your replacement harness.
The brass-plated solution is to obtain from a scrap car the plug plus about 200mm of wire off a scrap car.  (or longer if that will allow a more durable place for the splices).  Then install competent splices on the 6 wires - this is usually pretty easy to match up since they will all be different colors or sizes.  The durability of this work (how soon before you have to in there to fix it again) will depend on how well you do the splices.  Barrel crimps are the cheap way.