From his other threads (I googled SE/40) I think he found the European version of the SE FDHD with a 40 Mb HDD.

As for hooking up a Mac Mini to the internal display, that would be a total waste of time, and the computer would be unusable b/c of the extremely low screen resolution and the fact that the screen is strictly black and White. Your best bet to keep an original look would be to use a black and white CRT like in one of the Mac mini mods I've seen online.