How to play a C#7b9 chord on Accordion

AKA: C#7 Flat 9, C#7(b9), C#7/b9, C# Dominant 7th b9, C# Dominant Seventh Flat Nine

Notes:

C#, E#, G#, B, D
(C#, F, G#, B, D)

Intervals:

R, 3°, 5°, m7°, m9°

Left hand:

C# + Bdim  (D♭ + C♭dim)

Optional:

C# + C# Major + Bdim

(D♭ + D♭ Major + C♭dim)

Fingering:

3 + 2 or 4 + 2

Optional: 4 + 3 + 2