You look for it in Device manager.

Properties->Details->Location paths - you get something like this (for an HF+ on my system):
PCIROOT(0)#PCI(1B00)#PCI(0000)#PCI(0200)#PCI(0000)#USBROOT(0)#USB(3)#USB(1)
ACPI(_SB_)#ACPI(PC00)#ACPI(RP17)#ACPI(PXSX)#PCI(0200)#PCI(0000)#USBROOT(0)#USB(3)#USB(1)

or like this (AirSpy on my system)
PCIROOT(0)#PCI(1B00)#PCI(0000)#PCI(0400)#PCI(0000)#USBROOT(0)#USB(3)#USB(4)
ACPI(_SB_)#ACPI(PC00)#ACPI(RP17)#ACPI(PXSX)#PCI(0400)#PCI(0000)#USBROOT(0)#USB(3)#USB(4)

or like this for an rtlsdr dongle:
PCIROOT(0)#PCI(1400)#USBROOT(0)#USB(13)#USB(5)#USB(4)#USB(1)#USB(5)
ACPI(_SB_)#ACPI(PC00)#ACPI(XHCI)#ACPI(RHUB)#ACPI(HS13)#USB(5)#USB(4)#USB(1)#USB(5)

Then you learn to parse this out.

Or you get somebody to build a utility that will print out the information. There is a libusb call which puts it into a marginally more understandable form.
{o.o}