All it takes is a jeweler's screwdriver to depress the lock tab on the female terminals and remove them from the pre-wired connector block. Solder your wires to the terminals, cut off the excess pigtail, and re-insert the female connectors back into the block. I do it that way all the time when I'm installing relay-controlled circuits on my Gold Wing. If desired, you can fill the back of the connector block with black RTV to hide the solder joints.
Jerry
