Editable setting in Object Connection Transformations

I am looking for a better explanation of the settings for ‘Editable’ in Object Connection Transformations than what is provided in the F1 Help for Service Name = DocReferenceObject. Some examples would be beneficial also.

Scenario: I have a Source LU ‘A’ and a Target LU ‘B’. I connect a document revision to source LU ‘A’.

For each of the three possible values for ‘Editable’ (Source, Target, None):

• What am I able to do with documents at the Source, i.e., connect additional documents, detach documents, etc., and what effect does this have at the Target?
• What am I not able to do with documents at the Source?
• What am I able to do with documents at the Target, and what effect does this have at the Source?
• What am I not able to do with documents at the Target?

My reason for asking this is the documentation provided on this attribute is provided below, with my additions entered in parentheses.

None - This indicates that the inherited object connection is read only and no new connections can be made. (cannot be made where? Source? Target? Both?).

Source - All new connections (made where?) will be registered for (on?) the Source LU. Any existing connections on the Source LU will be editable (aren’t they already editable?). All other connections (made where? Source? Target?) will be read only (where?). (Also confusing here is the use of ‘new’ and ‘existing’).

Target - All new connections (made where?) will be registered on the Target LU. Any existing connections on the Target LU will be editable (aren’t they already editable?). All other connections (made where? Source? Target?) will be read only (where?). This is the preferred mode if you want the user to be able to attach new object objections (attached where?). (Also confusing is the use of ‘new’ and ‘existing’).