How to play a Cm7b5 chord on Accordion

AKA: C∅, C1/2dim, C1/2dim7, C7°5, C7b5, C Half-diminished, Cm7(-5), Cm7°5, Cm7b5, Cmin7dim5, C minor seventh flat fifth, C minor seventh flat five, Cø, Cº7

You can choose to play the bass (circled in green) or the counter bass (circled in blue). I prefer playing the bass but both positions are quite comfortable.

Notes:

C, E♭, G♭, B♭

Intervals:

R, m3°, m5°, m7°

Left hand:

C + E♭m (B# + D#m)

Fingering:

2 + 4 or 3 + 5

or 4 + 2 on counter-bass