You only need the panel to be wired correct any other wiring outside of the sub panel would be normal wiring practice's
Check that the Built in bus to see if it is isolated or not most sub box's are when you buy them and some you just need to add the Ground Bus which mounts direct to the metal Box
A power Filter will help with any EMI noise this should be mounted close to the input power to the VFD Drive and all mounted on a Grounded metal Plate
Lambada RSEN-2030L for your filter