How do I add more storage to the OMEN 25L Desktop GT12-1335qd CTO?

[CanadianBerry]

Hello, 

I am not very tech Savvy but I have a basic understanding and I don't want to mess anything up so any help would be amazing. I have been wanting to add as much storage as I can but I don't know how much I can add and don't want to waste money. I bought the PC with a 512GB M.2 NVME SSD only. I am not planning on upgrading the NVME anytime soon.

I have added a single HDD to it but want to switch it over to SSD eventually and add more SSD to the PC.  I only see two Sata and Power cables that are wired to where the brackets are, is there anymore cables or is there anyway of adding more cables other than the two provided?

I also saw a YouTube Video on how to add SSD in to the HDD Ports and it mentions using a third party support bracket so two SSD's can fit inside where a single HDD would fit. From what I understand this means you could physically put 4 SSD's (two in each HDD slot) inside this pc but again I have only seen 2 Sata and Power cables. In the Video I saw that there was no additional adaptors or wires needed for the SSD, but on other forums I saw that adaptors or other cables were needed for similar desktops, how would I know if I need those adaptors? 

So to sum up my questions:

1. How many SATA cables are there included in my model? 

2. If there is only two SATA Cables included, can I add more SATA cables?

3. If I can add more cables how I would I do that?

4. What  kind of SATA Cables or adaptors and what kind of SSD would I need?