How to insert specific block of ads only in AMP page?

I’m using Ad Inserter to insert ads on regular pages, but now I’m setting AMP, so I want to make sure I’m doing things right.
Because I’m using different ad units, I need to set up Ad Inserter specific ads units in AMP pages only. So, the way I’m doing this is by checking the “AMP pages” option in the Insertion tab, and I’m also using the “Lists” option and in the “Urls” I’m allowing */amp/

Is this the right way to insert specific blocks of ads only in AMP pages?
If I’m doing something wrong, how do I fix it?