jump starting

It looks like I need to jump-start my ride-on mower using my petrol A-Class (W177). I've seen plenty of videos where an A-Class is jump-started by other vehicles, but I haven't come across any where the A-Class is used to jump-start another vehicle. My main question concerns the terminal...

Hi folks, I thought I'd drop by and post this here in the hope it helps someone else. My own search for answers brought me through these forums time and time again but I happened to find the answer on an obscure video elsewhere after hours of searching. Apologies in advance if this is in fact...