Can someone please tell me what this is called?

[TheCandyMan 10+ year member]

i circled the thing i want to know the name of in red.
Any help is better then nothing. Thanks.

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[Popwarhomie 5,000+ posts]

*GP Dual Amplifier Inputs (Pair)

GP Car Audio is a manufacturer of many USA Made ðºð¸ car audio products. We are also a distributor for several top Audio brands including Sundown Audio, XS Power, and Deaf Bonce.

gpcaraudio.com

 

[MattinMO]

Isn't it self explanatory?

 

[huberoy123 10+ year member]

Terminal for your amplifier wiring. They are often used to reduce the gauge of wiring (1/0 gauge wire to 4/0 gauge). before it goes into the amplifier.

 

[Bobbytwonames 5,000+ posts]

This has to be a joke guys. A 10 year plus member asking this question? Come on!

 

[TheCandyMan 10+ year member]

*GP Dual Amplifier Inputs (Pair)

GP Car Audio is a manufacturer of many USA Made ðºð¸ car audio products. We are also a distributor for several top Audio brands including Sundown Audio, XS Power, and Deaf Bonce.

gpcaraudio.com

do they make single ones or are they always dual?
EDIT Nvm found the singles on that site. THANKS!