How to use reserved seat tickets when transferring trains?

Hello,

I will be traveling from Hiroshima to Tokyo using the JR Pass and reserved seats on the Shinkansen.
There is a transfer in Shin-Osaka.

How to validate the tickets at the gate?
So far i've been putting both the JR Pass and reserved seat ticket in the ticket reader at the gate, and things work as expected.

Would i have to put the JR Pass + the reservation Hiroshima<->Shin-Osaka + the reservation Shin-Osaka<->Tokyo in the ticket reader in Hiroshima?

Regards,
J. Reis