Hi Harry,
though I have never seen pics of this combination, it seems that by the end of the war the Germans used any vehicle they could get their hands on to tow stuff (even if it was officialy beyond the limits of the towing vehicle).
I have seen combinations of the single barrel Flak being towed by civilian vehicles. So I would say, assuming the Sd.Kfz. 234 is not too much overburdened, this is a possible combination.
Hope this helps,
Harm.