Question [Q] What is the name of the black connector mat behind my charger?

Hi, I have an Iocean X7 Elite which I have had for almost 8 months now. Recently I cracked the screen ( by accident of course) and I have purchased a new one.

So.... I installed the new lcd screen myself and it works fine. Only problem is it did not come with this black connector sticker/mat that lies behind the battery. So I was unable to connect my mainboard to the speaker, mic and charging socket area of the phone. I did peel the sticker/mat off the old lcd and connect it to the new one, but to no avail it does not work.

I really need help on what this mat is called as I believe this is the issue with the phone. Any help would be appreciated.. Please feel free to ask any questions.

Thank You Very Much