The Energon Pub

I acquired a headless, partially-dismantled, minorly-broken Leader-class Starscream off eBay. The broken spots will be straightforward and easy to fix. The head... It's either source one at some point or fashion a replacement myself, nothing else to it. It's the reassembly that's the tricky part frankly. There are two particular points that are stumping me. Just the one point now.

The first is three four LEDs and a tiny button that are currently stuck hanging out. They're supposed to go in the cockpit section somehow but it's not immediately obvious how. I don't know where all the LEDs are supposed to go. Or whether some of them are supposed to go in the head.
The second is the points where the arm assembles join to the main body. Are there some cover plates I'm missing, or did these just use wide-top screws?

I could really use some photos of how the cockpit area is supposed to go together. And ideally of a dismantled head.

Perhaps pictures of what I'm talking about would help:

Well, was able to resolve the question about the arm mounts by watching a vid of him being transformed. But I still need to be sure of how the dangling electronics are supposed to fit back in. You wouldn't need to remove any pins to check, you'd only need to remove a few screws.

Just realized I miscounted the number of LEDs. Is it really such an onerous thing to help out with?
EDIT: Worked out where the button goes but still stuck on the LEDs