At this moment when using the remote plugin method to insert stuff you can only use 1 keypair per Presentations2Go server. So only one Presentations2Go group can be used.

A future update of Brightspace, expected in September 2019 will resolve this limitation.

In the example below are both a remote plugin (recognizable by the closed eye icon) and the existing activity setup using the same Presentations2Go group with the same launch url, consumer key and secret key.