OK- - - -you've got a slightly different connector than the Bosch relay plugs have, but the same basic procedure applies. Once the connector is removed from the block, make a soldered Western Union splice close to the connector, insulate it with shrink tubing, and re-insert it into the plastic holder. It's usually possible to re-use the locking tabs that hold the connectors in place if you carefully reshape the tabs. It looks a lot more professional than using an ugly butt splice to attach the wire to the fuse block. Good looking work so far!
Jerry