Hkoenig bw1880 Manual De Instrucciones página 21

1. The Heineken connector that comes with your beer cooler can work
with all Heineken 5 liter kegs. However you must use a flat head
screwdriver to remove the green base from the keg in order to install the
new connector, provided with the beer cooler.
2. When install the new connector to the Heineken keg, you must firstly
install the clear beer tube one end to the connector, one end to the tap
mechanism, then install the connector to the Heineken keg.