MNEPV-300 20A used as 2-pole?

[Saggys]

I am hoping I can use a MNEPV-300 20A breaker as a 125vdc 2 pole PV input breaker. It is polarized and the one side is jumpered + to - with a copper bar jumper.

I am thinking remove the jumper and install the PV in to the breaker and the load side to the AIO PV input.
The breaker polarity should remain correct. The breaker has a copper jumper for a series connection I believe for the 300 volt rating, the two tabs are ganged together.

Will this work? I already have it and it would save me money.