How to run LoFi piano in Logic Pro X?

I downloaded both Lofi Piano and HALion Sonic SE( i dont know what this does?) thru the Steinberg Download Assistant. When i open Logic Pro X i cant find the plugins among Logics own plugins. Do I have to put them in the VST folder in the Plugins folder or how does it work?
Im a rookie when it comes to Software instrument.

Thank you for your help.

LoFi Piano is a sound library for Halion Sonic SE 3. To use it in Logic, please install the AU version of HS SE, as Logic doesn’t support VST plug-ins.