Right, I'd like someone else to check my working here - I've had to squint an awful lot at that last image. There should be 6 bolt heads with three plates attached. Those plates can be reconfigured according to star/delta configuration. You should reconfigure the plates to sit one across the U1 and W2 bolts. One across the U2, V1 bolts and one across the V2, W1 bolts. Three plates, sitting parallel with each other. Your U/V/W wiring goes one to each of these (e.g. U to U1, V to V1 and W to W1). If the motor spins the wrong way, reverse two phases.

The other configuration - star, for 380V (not 330V) is shown with the plates shorting the W2, V2 and U2 bolts. But you probably don't want this.

That's the wiring side of things - does your VFD support the 4KW spindle?, you may need to reprogram it with the new spindle characteristics.