Relationship between tables

Question

Hello Guys

please help me , i need to their exparience in databse to put good relationship between tables inorder its works as good functionality. i will be upload tables as photos .

 

1. tbl_Emplyee ( EmpId(identity)  , EmpNo(Pk)

 

 

2. tbl_Items    (ItemId (identity)  , PartNo (PK)

 

 

3.tbl_Custody (CustodyId(identity) , EmpNo(pk in tbl_Employee) , (PartNo (pk in tbl_Items)

 

 

i need to create relationship between three tables above 

 

4. tbl_SimCard (SimId (identity) , (ServiveNo Pk )

 

 

 

5. tbl_SimCustody (SimCustodyId (identity) ServiceNo Pk in tbl_SimCard) (EmpNo Pk in tbl_Employee)

 

Thank You to any one supported to me .