Confused about how to use dash blanks?

Ok so I'm getting my new HU and I want to modify some dash blanks for aux and USB. Well call me dumb but how exactly can u use these blanks? I pulled on out and there's no room to run anything. There's a lot of plastic backing on them. Do u just cut the plastic down and the grind away behind the face of the blank? Also I saw there was a sticky about how to modify the existing aux port to work with a new HU but how do I dismantle the aux buttons guts to do this? Thanks guys

 

The blanks aren't really made to be "used" for stuff...They are just meant to hold that spot. It'll take a bit of cutting and molding and what not to get them to be useful for your purposes.
So you can work with those or just make a completely new face plate to go with your new parts...

 

Subbed

 

Use a dremel to cut out the size of the hole you need by taking off little amounts at a time and test fitting repeatedly to get a good fit.

 

I drilled a hole and squared out the spot for a 1' USB extension and superglued it in there.

 

I'd like to go the route of just getting one of those aux/USB switched from a tundra. Don't know if I can justify spending like 60-70 bucks on it. But it may be easier to go that route.

 

somewhere on here somebody did something very similar. I just can't find the thread right now.