Artificial intelligent assistant

Best Way to mount Wald rear folding baskets to the rack on a Batavus Fryslan I just got these awesome Wald rear folding baskets as an early christmas present from my Girlfriend. The hardware they came with will not fit on my Batavus Fryslan Rack. What would be the best way to mount them?

After posting this question, I got a twitter response from my local bike shop where I got my Batavus. They suggested screw clamps, and I agreed it was the best choice and mounted my rack with them. Urbanistic tea and bike is awesome!

xcX3v84RxoQ-4GxG32940ukFUIEgYdPy a2b31c796cb4001151e0f1e3097b40ed