It’s a lander can with 4 baguette tanks around it.

Underneath is a docking port surrounded by 8 spider engines, which were hidden in the decoupler of the lander stage.

On top of the lander can is a science Jr and a small cargo storage module with an antenna right on top.

The lander stage that was left behind was just a fuel tank and engine with landing legs and a decoupler.

There’s plenty more odd designs where that cam from too!