[Uploading MIOS] can I upload with a midi link chain ?

Hi folks,

I have just done my pretty Core link between my 2 cores.

I only put 2 midi port (IN & OUT..)

one on one core, the other on the other or

Can I upload my 2 firmware in that configuration ?

I saw in the docs that in MIOS Studio there is an ID parameter..

Or should I put 2 other ports each single one on one core ?