The electric circuit diagram shows that ONLY ONE thin red wire connects to battery positive post.
This one wire divides into 2 - part A and part B.
Part A divides into two again - one for charging from RR and second portion supplies power to ignition switch.
Part B supplies power to power relay.
So the black-connector-with-red-wire that connects to battery positive post
(in the picture of my G5 in previous post) is the last portion of the 2-wires-merged-into-one.
@DAVE: Looking at Matt's one of the pictures, the blue-and-white wire connector on his B5 (with 5 wire relay) is the same as in your package BUT it is different from blue-and-white wire connector on my G5, which has 4 wire relay ! They will NOT connect to each other.
IF YOU HAVE 4 WIRE RELAY ON YOUR C5, TRY TO GET THE 4 WIRE UNIT.
IF YOU HAVE 5 WIRE RELAY ON YOUR C5 THEN IT SHOULD MATCH. If you don't remember which one is on your bike, buy ONE of EACH, still cheaper than buying one in UK or US
.