You can also solder the negative to the inside of the connector if you like. I have done both depending on the type of
mod you are building. Then you can easily push the whole connector assembly into your
mod with no obstructions. To make soldering a little easier, you can use .... end of a drill bit and push the center post out. You can also remove the silicon ring but it's a hassle to replace it. If you are new to this, I will offer one other bit of advice....get yourself some liquid flux or the paste from Radio Shack. It makes it so much easier. Good luck!