Earamendi, what you need to understand here is that the table name in Xtraction are nowhere to match the one in ServiceDesk's database.
johsc03 is talking about SDM table and you about Xtraction table. You guys are not even close to understand each other.
What you need to do is decide wheter you want to the affected end user's special handlings, the customer's special handlings or both.
Xtraction works exactly like a SQL Query. You need to understand SQL first if you want to map fields easily in Xtraction.
The logic is as below : (SDM database table or column name will be in paranthesis)
Table
REQUEST (call_Req) is linked to table AFFECTED_END_USER (ca_contact) using the contact_uuid. You should be able to find this join under the REQUEST(call_req) table details, tab Joins.
You need to link table AFFECTED_END_USER(ca_contact) to usp_contact_handling using the contact_uuid.
Create a new table in Xtraction, name it AFF_END_USER_HANDLING_REL (usp_contact_handling).
Add the contact and special_handling column.
Create a join on the table AFFECTED_END_USER(ca_contact) and left join the Affected end user PK (contact_uuid) to the contact column in the AFF_END_USER_HANDLING_REL(usp_contact_handling) you just created.
You now need to map the relation table to the usp_special_handling table.
Create a new table in Xtraction, name it AFF_END_USER_SPEC_HANDLING (usp_special_hanling).
Add the id and sym columns.
Create a join on the table AFF_END_USER_HANDLING_REL you created few steps ago and left join the special_handling column to the id column in the AFF_END_USER_SPEC_HANDLING table you just created.
You can repeat those steps to map the special handling for the customer, just change the name of every table you create. Like a SQL query, you have several join on the same table with different aliases. Wich is exactly what you will be doing in Xtraction
And again, try to type the query in SQL first. This will be much easier after to replicate it in Xtraction.