OAI-PMH Module - itens not sent to receiving platform


The sites we have in our Omeka S are being integrated into another platform via the OAI-PMH plugin. Nevertheless, we want it to send the proper link of each item, and not the API link, which is the one being sent.
The links to the origin of the items provided by out Omeka S, when received by the other platform leads them to the API projetos.dhlab.fcsh.unl.pt and not to the page to access the itens. Those include links to thumbnails and digital objects in a complete resolution, but they are not visible in the receiving platform.

How can we solve it?

Thank you in advance!