SRM7 Opening Catalog in new window

We're punching out to an external catalog from the Purchase Order screen.

Clicking the "add item" button we then select the 3rd party catalog. This then opens the site in the same window. Is there any way of getting this to open in a new window?

From what I have read if its configured in SPRO under standard call structure it should open in a new window anyway?

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Is there any PFCG settings we can modify to achieve this?

Thanks

Tony