Update 2024
It's been 8 years since I first added DB25 side exit slat connectors to an 18M. I had sold off all my 18Ms for 36 and 72Ms.
I bought 2 new 18Ms and decided to add the side exit slat connectors to them. I still had most of the parts from before.
I basically did the same as I did before. I used a drill and saw to quickly cut the foam this time. I also cut out an area to store the battery cover and battery clip that I removed.
I have found that all 18M Quick Plugs come with the cue slats with the needed plugs. The standard 18Ms do NOT come with these plugs (unless you ask Cobra when you order them). They are normally only supplied with the Cobra slat adapter kit.
Here's a bunch of pictures from the 2024 build: