In general, it's a personal journey for everyone. You can visit YouTube and look for solar setup for Class C videos. There are bound to be something similar.
You had all kinds of plans in earlier posts.
Some folks run wires between vent pipes when they can get into a space behind a wall. But not every Class C has such a space.
Here's one from RVing with Tito on YouTube. He does great DIY videos. He has a Class A now (for years he had a Class C - and there are videos of that). He ran this through the fridge vent.
So, it won't be exactly the same, but similar. You'll figure it out when you do it.