No, it is not necessary to drill holes in the washing machine to install the Wpro SKS101 connection frame. This frame is an intermediate mounting kit designed to connect a washing machine and a tumble dryer at height, saving space without invasive modifications to the appliance. It is generally fitted between the two appliances without drilling into the washing machine.

Thank you for your reply. Did I receive the right product when I ordered?
In the instructions it says that I have to drill a hole in the machine.