Epson wf3520 127xl ink cartridges refill

[tecknobandit96]

Hey all, I bought refillable ink cartridges for my printer a while back to do some video game covers that are missing (no big deal). Then I started on the project to find out that my yellow is out and so that led to me buying them. I'm not quite sure where to refill them, and why the cartridge is messy is that I tried to tackle it first. I did some research and I first refilled it into the bleeder valve which is a big no. Then I tried the rubber piece beside it and that didn't refill either.
So how do you refill the ink cartridges for this model?

 

[AmaDeuSbg]

Hello,

The circle with the dot in the middle is rubber and removable and you can pour the ink there. Then remove it and when you peel the yellow tape it will let the air inside the cartridge escape through the hole where the yellow sticker was and prime the chambers inside the cartridge. If you already removed the yellow sticker before you put the ink in the cartridge and you find problems with nozzles, you can use a syringe without the needle and suck the air out through the hole where the yellow tape was (you shall leave some air and not let the ink go through that hole, it should be at the base level of the cartridge. After you fill it, just put back the rubber seal with the dot and you are ready to print

P.S: The above is from my experience with such cartridges, if something above is wrong some might correct me but that worked nice for me previously when I used such cartridges.