You can find the other levels here https://imgur.com/a/wZ9IOgh

When I played it with my group I had the following encounters layed out.

Big room with the turntable: 1 blind Iron Golem left there by the dwarves to protect them. It's too strong for my level 7 party, so they had to find a way to distract it.

Cobweb Room: 1 Deathweaver (Tome of Beasts2) with 4 web zombies

Crane Room: 1 Mindflayer and 4 thrals (I used Quaggoths)

The rest of the rooms contain some useful loot that youay see fit. There's another variation of this map that shows the mind flayer city at the bottom of the pit. And there's also a layer above which I'll post as soon as I find a way to post multiple images on Feddit.