Approach and talk with Jezebel. She will be grateful for the assistance, if somewhat ungrateful for the new body. How she responds depends on the kind of effort you put into the body itself (check?).
You can now ask her about the Mechanist, her attitude and a few other things. Talking to her about "Helping" people is quite interesting. She will give a good explanation to why she considers what she does to be helping. Then ask her about getting into the Mechanist's facility. She will give you the schematic for the "M-Sat" modification.
- Jezebel will remain in whatever settlement you built her body in. She could depart after you complete the Automatron storyline.