There are rules for fingering, but they don't work for everyone, especially those with small hands. I would play the the Chord you posted exactly with the same fingering you used. Short Ex.,..fast left hand chords used in a fast song below
FCEb/ACEb
FD/...BbD (You can include the Bb in left)
FC/...AbC (Same here, include Ab in left, that way you can riff or run in rhythm)
FD/...BbD
FCEb/ACEb