Hello Kenny,
It is quite complex and you might not be able to archieve it by your own. It is not an ABAP-view. The steps wouold be like that:
1. Open you view (screen) in WebUI (CRMUI).
2. Click on an editable field or hyperlink in the view and press F2 until you get a popup.
3. Read which component and view this is.
4. Go to transaction BSP_WD_CMPWB and enter your component from step 3 and select the right view.
5. Check in the configuration (the right one as shown in the popup of step 2) if you can add a field. I thought you already did that but eventually you did not.
6. If the right field is not available you might try to add the attribute to the context node but this is more complex.
Eventually steps 1-5 are already enough. All of this is WebUI configuration and if you looked your your view in SM34 it might indicate that you are not really familiar with it. So be careful.
Best regards,
Thomas Wagner