SunFounder Raspberry Pi UPS powered by external 5V

Hi everyone,
I need some help with my Sunfounder UPS which use USBC input to charge the batteries. I must connect this UPS to a permanent power supply of 5V 6A with only two terminals without USBC connector, to do that, can I use a normal USBC cable and connect one terminal to the UPS and strip the other terminal and connect the VBUS directly to the 5V? Thanks for your help.

I’m very sorry, didn’t quite understand what you meant.
I hope you can give us more details on how you use pipower to work.
Or you can provide the workflow of pipower and your equipment, how is a workflow.
You can simply draw a flow chart for us, so that we can analyze the problem.