Here's some photos of my conversion of a dual 800k SE to an SE/30 I did a couple years ago.

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In this case, there was no cutout for the SE/30 PDS slot, which wouldn't matter if you didn't have any expansion cards. The power connector cutout was also too far forward. I hacked up holes for both when getting it to work.

More here
In this case, there was no cutout for the SE/30 PDS slot, which wouldn't matter if you didn't have any expansion cards. The power connector cutout was also too far forward. I hacked up holes for both when getting it to work.