I might suggest lifting straps, rather than wrist cable attachments.
Simple to uses and very easy to slide on or off. They come in pairs, one designed for the right hand and one designed for the left hand (of course). They are self adjusting and very reliable. Prefer the straps made from a nylon material, pretty much the same material that seat belts are made from. Not much money, a good investment.
There are also leather and cotton straps. I have snapped a few cotton straps over the years, they will rip over time. The leather ones can stretch a bit, but still good.
Wrist/hand/glove type attachments have been around for a long time and probable at least a dozen or more in different styles. A few BB'ers prefer them, because when your grip gives out your not going to be able get those extra rep in that can work the muscles to their best. Trying for 8 reps and failing at 5 reps because of grip is a example.
Some PL'ers and Olympic lifted will use straps, but very limited in their training. If DL'ing 550 and you want to try for 600 for 2 reps. than some guys will apply lifting straps for that new weight. Just getting the body use to that extra weight attempt. The grip will usually catch up to the weight that is lifted after a while.
There is also the hook grip that some lifters used, rather than lifting straps. But it can have limited for a lot of guys. A lot of lifters use mainly chalk, either from a stick, block or powder form. Also other sticky stuff around for the grip.
Good Luck.