H110i Getting USB in without taking block apart.

***APPEARS TO BE THE H110i APOLOGIES***

Hello everyone!

To cut a long story I acquired my PC from a friend a while back and have recently decided to try and fix a problem it's had since I bought it - the inability to change the RGB on the water block.

Now the block doesn't show up in any software but im 99% sure the reason for this is because when my friend installed it he decided against adding the USB component that is in the side of the block.

I have a Micro USB cable handy and as far as I know, I should be able to just plug this in and connect it to a USB port on my PC change the RBG and then take it out which is want I want to do.

The problem I have is that there is I think there is a "flap" covering what I imagine is the port on the side of the block. Since my friend decided not to install the USB to begin with he obviously didn't remove it - my question is - is it possible to do so without taking the block apart? I don't wanna poke at it with a screwdriver and cause more damage that I should be because I've been stupid.

Any help would be much appreciated

Cheers!

EDIT:

https://i.ibb.co/3fT7bcK/20191104-160042-1.jpg

Added an image (Apologies for the dust, haha)

Are you sure that is a H100i? It looks more like a H110i (GT) which will have 140mm fans, 280mm radiator vs the 120/240mm. It is also a different OEM and thus some construction elements are different as well.

If that is the H110i (formerly GT), then the rubber cap is hiding the mini-USB port.

Yep, looking at it I think you might be right, I was going off the information that he gave me but googling it that looks like the exact same product. Whoops.

Can I just prise that cap off without causing damage?