TPSM64404: using this module for duel ±10V supply question:

Tool/software:

Hi

so i was all giddy about being able to use this module to create a duel ±10V power rail, having multiple links to inverting buck-boost topologies inside the datasheet. 

only when i started my actual schematic did it hit me, what do i do with the grounds? 

lets assume vout1/pgnd1 will have the normal connection to 10V output buck.

and vout2/pgnd2 will be the -10V rail. 

how should i proceed? does PGND in pin 28 connects to pgnd1? what about pin 6 AGND? 

please advise

Daniel