Passat losing cooling fluid. Need to find the leak.

My Passat is losing hydraulic fluid. Workshop appointment on Monday; I hope it is just a broken hose.

I just brought my first Thinkpad, the T22, and my third, R60, back from my parents. I will try to install Windows XP on the former and Windows 10 on the latter to bring them back. I have also brought lots of old games that don’t run on modern machines.