STK032 analog

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Ask the people who make those modules.

Inverting and non inverting, see op amp texts, means phase change I think.

If there are excess pins, leave them open, or grounded.

STK audio amp modules were two amps (sometimes up to four), in the same housing with the power supply pins shared between amplifiers.
So you have to connect signal in, power in, signal out, and mute pins, from the old circuit.
The others may or may not be needed.
If you are getting confused, read up, many threads here about STK issues.

And wait for help, I seem to be the only one responding to you so far!