Easiest way is to turn the machine off, turn the key to the "on" position, release the park brake, then activate the auxiliary and loader functions a few times. Usually that does it, but if it's hot outside (above 70), good luck. The fluid in the attachment gets hot, pressurizes, and then you'll have to crack the hoses to get them on. Not a big deal, but on those hot days keeping attachment swapping to a minimum is best.
Go hard, go fast, or go home