Solders in or you can use scotch locks if you're willing to risk the poorer connections.
Connect the ones on the fuel pump barrel connector to the wires in the FRONT of the connector ie the side that has the thinner coloured wire sheaths. The ones at the back are thicker, all black and harder to access.
Ordered mine from the German (home) website. I know no German, simply used google translator. Works out to be about £105 at the current exchange rate and there is no postage charge on top of the E129 on the home site.