The LED should be located as close as possible to the driver. (Ideally within a few inches) If you need to mount the driver some distance from the LED, be sure to use a gauge of wire that is suitable for handling the current you are using. For strobed application, the driver must be within 6" of the LED to maintain accurate timing.
Power input wires to the drivers should also be kept as short as possible. It the power source is more than 18" away from the driver, then a 220uF 50V electrolytic capacitor should be put across the input terminals.