IAC and identification
 

So I finally got to the IAC sensor today. Didn't really seem as though I did much. I sprayed it with carb/choke cleaner and put it back. I'm not sure if that plunger is supposed to move or not but it didn't budge. There also didn't appear to be a lot of sludge built up on it. The Haynes manual I have said replace the gasket, but there wasn't one. Should there be?
Also, while looking around, I found these two connections. Any idea what they go to?

Anyone with any idea of those two connections?

By their size, number and location I'm guessing ABS connections. The larger red and black would go to the motor and the other for the module. They look like they connect on the top of the module.

That sounds like something I would need isn't it? Would the ABS system not be working properly if they weren't connected? Thanks for the response by the way.

Correct. The ABS light means the system is not working and the wheels will lock up. They may have been unplugged to make the light go out.

Thanks Rusty, they have locked up twice and I skidded, but I assumed it was due to the severe ice condition at the time. Guess this is something I'll have to put on my "to do" list.
Thanks for the input, really appreciate it.

They're referring to that o-ring.

Thanks, thought so.

Yes the plunger should move in and out

It didn't budge, it did spin, but no movement up/down, in/out. My manual also mentions something about measuring the one you take out as the depth of the new one should be the same. I didn't see where this one would adjust any. Should it?