My daughter & I are planning to instal new cupboards including trough in the Laundry. We're using Bunnings flatpacks. Are we able to have an opening pre cut in the cupboard end nearest the washing machine for the power cord & W/m hose, and also in rear panel of same cupboard to accommodate new power point & tap connection for W/m? Can the bench top be precut to house the trough in new cupboard?