3-1 cables means you'll be getting 3 grounding cables and 1 alternator cable. The more cables you have is obviously the better for your car.

I'm not so good in explaining about electrical components of our vehicles but I'll try la. More of an accessory person

So take for instance that the electricity from your battery is a car and the battery is situated in Shah Alam. The electricity wants to go to SS2 which is probably the combustion chamber. Basically your original car allows one road to connect from this Shah Alam to SS2. And that road may be used by other cars to get to somewhere else as well. And this may cause a traffic jam.

But with grounding cables, you are opening more options like NKVE, Federal Highway etc. So there are many other options for the electricity to get to the combustion chamber. That way more efficient electricity is able to reach the electronic components of your vehicle and improve the performance la. Hahaha (noob explanation)

Meanwhile for VS, its an extra battery. With the grounding cables (negative terminal) all coming back to your battery, its like a highway with 6 lanes suddenly become 2 lanes. Confirm traffic jam also. So the VS helps provide a support to the battery to accept the electricity back and boost the lifespan of it.

PS: Bro Asyraff, I'll PM you on the details of the items you're interested in. But I'll appreciate that we do not conduct our business here. Its rather off-topic. Please look for me in my thread