I have been lurking these forums for some time, and found a lot of useful info.
Thanks to this thread I managed to find the accessory connectors, located underneath the riders seat and the left side fairing.
They are taped to the original cabling with black isolation tape. Look for the tape, and you will find them.
The photo's in the opening post are very useful.
I created a account to return the favour and share the info I found about the connectors.
They are Sumitomo connectors, type HM090.
Part numbers are 6187-2801 / 6180-2451 for the male and female plastic part.
Since Kawasaki was kind enough to leave a empty male part on the connector, basically you only need the pins and seals.
Part numbers are 1500-0105 for the pins (Sumitomo 2.3 pins) and 7160-8234 for the seals.
I found them both at Auto Click; https://www.auto-click.co.uk/1500-0105_strip?search=1500-0105