Hello, I love to try and repair older style test equipment and one that I'm working on is a Hameg 408-1A scope and it uses loads of this type of cable in both 3 and 6 cores as per photo. I thought it would be described as ribbon cable but on searching for ribbon I keep find the multicolored flexible kind which is not the same thing at all.
The cable I'm looking is solid cores and has to pushed into self gripping sockets have a push to release the cables mechanism. The cable on my old scope has been disconnected so many times now that the cores are fracturing and also because of that, it has been cut back and restripped that the leads are not really long enough now either.