Where do I plug in a USB mouse/keyboard on eval board + iMX7S given that USB 1-4 are un-powered,

I’m using /dev/ttymxc1 OK as a console, but would like to also use a mouse, do jumpers JP17, 18, 20, 21 preclude this combo?

Where do I plug in a USB mouse/keyboard on eval board + iMX7S given that USB 1-4 are un-powered,

USB 1-4 are un-powered due to the i.MX 7Solo SoC only featuring one single USB OTG port and no further USB host ports.

I’m using /dev/ttymxc1 OK as a console, but would like to also use a mouse,

Then just plug it into X30 using a regular OTG adapter.

do jumpers JP17, 18, 20, 21 preclude this combo?

Those jumpers select whether UART_A goes via FTDI USB-to-UART chip to X27 or via RS232 transceiver to the lower X25.