I've been dreading this part of the build, was never sure how I would do it and make it neat. But everything is coming together now and so I had to do something.
Because my custom fuse/relay panel sits where the ECU normally goes, I've had to install the ECU in the glove box. It's not a bad spot to put it, just my solution isn't "clean" for my liking.
I also decided to use the stock tombstone, goes much better with the rest of my interior. So the KG Works tombstone will be up for sale soon.