The grounds is normally connected to the Ground lug on the VFD and then carry on through to the motor frame.
I don't think it will be necessary to put the jumper on as it does not really do anything, as long as you connect just the L1 & L3 to the 240v, the neutral is not connected.
I think the previous damage was cause by wrong hook-up all together (wrong terminals strip).
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.