How to play a Bbm9 chord on Accordion

AKA: Bb-7(add9), Bb-7/9, Bb Dominant minor 9th, Bb Dominant minor ninth, Bbm7/9, Bbm9, Bbm7(add9), Bbmin7(add9), Bbmin7/9, Bbmin9, Bb minor7/9, Bb minor9

Notes:

B♭, D♭, F, A♭, C

Intervals:

R, m3°, 5°, m7°, 9°

Left hand:

B♭ + B♭m + Fm

Fingering:

4 + 3 + 2