Is NLEX and SLEX connected?

Could you please clarify for me if the North Luzon Expressway (NLEX) and the South Luzon Expressway (SLEX) are indeed interconnected? I'm interested in understanding if there's a direct route or connection between these two major highways in the Philippines that allows for seamless travel between the northern and southern regions of the country. Additionally, if they are connected, could you provide any further information on the nature of this connection and any potential benefits it may offer for commuters and travelers?