This will let you manually enter each chord:
https://stash.reaper.fm/v/47371/ReaTrak-insert-media-cue-to-selected-item-active-take-wav-source-file.zip

Leave a blank name to remove cue at cursor. You can set an action key to run the script.
They will be written permanently in the wav file and show in Reaper each time you load the wav.

[Linked Image - Only viewable when logged in]

[Linked Image - Only viewable when logged in]

[Linked Image - Only viewable when logged in]

[Linked Image - Only viewable when logged in]

Run Action > Theme development: Show theme tweak/configuration window

search for media item label font to change cues font, search for marker to change color.

[Linked Image - Only viewable when logged in]