Load the gcode to the SD card and put it in the SKR.
The lowrider is a flying controller (It moves around, to use a remote cabled sender you need a long USB cable and the cable chain sees lots of motion and also ESD issues from the router / chips / dust extraction).
My opinion is that a cable-attached sender is a bad idea for a flying controller. If you want the convenience of a remote sender, you might consider using an ESP01 on your SKR.
When designed for intermittent/unreliable interfaces, it’s done the way FluidNC does it with their pendant, where every line of communication is presumed to fail and thus any corrupt line does not ruin the utility of the remote interface. Since Marlin doesn’t work this way, the next best thing is to use something like the ESP01 to keep the files local to the SKR but still let you remote control starts/stops and job related itms.
Ryan used to sell ESP-01s in the shop for SKRs, but that may have been overcome by the release of the Jackpot.
They’re really easy to load. There’s a thread about it here: