Configure button for A/T, and CMD B

msfs-2020

Hi all! Until I purchase a proper MCP Hardware like Coreflighttech or Mastercockpit, I was wondering which buttons can I use and where can i find the corresponding inputs in msfs20 control options, for Autothrottle engage-disengage and CMD B button (when Glidescope is engaged).

My aeroplane is pmdg b738.
Bravo throttle quadrant.
Boeing TCA Yoke.

Thank you for your help

Take a look at this post.
https://forum.pmdg.com/forum/main-forum/pmdg-737-for-msfs/general-discussion-no-support/204758-auto-throttle-disconnect-and-not-auto-throttle-arm