Fabric softeners and liquid detergents (applicable to the models with a liquid detergent cup only) are dispensed through a process called siphonage.
Siphonage is similar to the flushing of the toilet. The liquid detergent/softener that fills the detergent dispenser up to the Max line mixes with the water in the detergent dispenser when water is supplied, and when it reaches a set level, siphonage operates and the mix is flushed out into the laundry.
This guide was created for all models, so the images or content may be different from your product.