CST - Interface between wire and planar surface?

Hi all,
I am new to CST, i have a problem definition and please suggest on realising this in CST and analyze magnetic fields. I have attached an image for better understanding. 

My main problem is interfacing/merging/joining the wire face with the metal face and still be able to apply the current source and run!!

If anyone who has performed this kind of simulation, any kind of leads would help..

Below i mentioned Problem statement.

Thanks. 

 

Objective: To connect the two ends of the wire with the metal housing. Run the DC current( say 100A) through wire so that it returns through the metal housing. Observe the B-Field.

Solver Type: Magneto-Static Solver, Current Source Type: Current port on the face of the wire. ;;; can we use any other solver?

Question: Can we model in CST in such a way we can merge/join the circular face of the wire with the planar surface of the metal housing and still assign the current source? 

Case1: Complete Solid Body for metal housing.

Case2: Hollow body with some thickness of walls for the metal housing.

CST Studio Suite