Using BDM relationship links in Ui Designer

Hello everyone!

I wanted to know if you could help me with the following queries:

1- Using UiDesigner, how can I get the value of the link of one of the clients? I am using a select widget.

2- Once I have obtained a link from the client, how do I obtain the information? I will use the information to load another select widget.

This is the json of the clients, each one has an vehiculosInversion:

[{"persistenceId":0,"persistenceId_string":"0","persistenceVersion":0,"persistenceVersion_string":"0","id":"0","nombre":"Luis Machado","links":[{"rel":"vehiculosInversion","href":"/API/bdm/businessData/uy.com.checksum.tradebook.Cliente/0/vehiculosInversion"}]},{"persistenceId":1,"persistenceId_string":"1","persistenceVersion":0,"persistenceVersion_string":"0","id":"1","nombre":"John Petrucci","links":[{"rel":"vehiculosInversion","href":"/API/bdm/businessData/uy.com.checksum.tradebook.Cliente/1/vehiculosInversion"}]},{"persistenceId":129,"persistenceId_string":"129","persistenceVersion":0,"persistenceVersion_string":"0","id":null,"nombre":"Luis Machado","links":[{"rel":"vehiculosInversion","href":"/API/bdm/businessData/uy.com.checksum.tradebook.Cliente/129/vehiculosInversion"}]}]