Question regarding the LiPo SHIM for Pico

What are the pins used by the LiPo SHIM for Pico? (LiPo SHIM for Pico – Pimoroni) Will I still be able to use GPIO0 to GPIO5 of pi pico to interface with other components?

The schematic is here, it will show what pins are used.
pico_lipo.sch (shopify.com)

I don’t get what does the pico connector pin 1()3 of gpio0, 2()3 of gpio1 means

I don’t get what does the pico connector 1-3 of gpio0 and 2-3 of gpio1 means

I don’t know what the *3 part means? I don’t think it matters anyway.
The LIPO Shim physically connects to pins 1 to 7 and 34 to 40.
Only VBUS, VSYS, POWER_EN and 3V3 are used, plus Ground of course.
It doesn’t use any of the GP (GPIO) Pins. As near as I can tell anyway.

Alright, thank you so much!