NKJV John 1:7

This man came for a witness, to bear witness of the Light, that all through him might believe.

MEV John 1:7

This man came as a witness in order to testify concerning the Light, that all men through Him might believe.

I don't understand why MEV capitalized Him?

Now I'm confused whether John 1:7 is talking about John or Jesus?

I've always believed it's John.