Hi all!

I wanted to make up some cables to connect to the factory wiring looms without having to splice into anything so I had a dig around the internet to try and find some of the various connectors that are used, here's what I found.

Firstly, these excellent AliExpress shops have photos of many different types of automotive connectors, organized by pin count, which makes identifying connectors much quicker.

https://cnjorch.aliexpress.com/store/group/4P/3057054_512866188.html
https://www.aliexpress.com/store/group/6-pin-connector/5877061_1000000581336.html

Here are some parts, and the connectors that are on them.

Brake sensor connector (5HY0-080010 HYDRAULIC INDUCTION SWITCH):
4 pin female, Sumitomo HWS (HW Sealed) series 6189-0132

https://prd.sws.co.jp/components/en/detail.php?number_s=61890132
https://www.aliexpress.com/item/1005002376546639.html

Headlight switch (off, side lights, headlights) (5HY0-151100-10000 ILLUMINATION SWITCH):
4 pin male, Sumitomo HWS (HW Sealed) series 6181-0073

https://prd.sws.co.jp/components/en/detail.php?number_s=61810073
https://www.aliexpress.com/item/1005002376546639.html

Highbeam switch (low beam / highbeam) (5HY0-151200 DIMMER SWITCH):
6 pin, blue connector, has a removable ring on the male side which is used to keep the seal in place.
Sumitomo MTS (MT Sealed) series 6189-6171

https://prd.sws.co.jp/components/en/detail.php?number_s=61896171

black - https://www.aliexpress.com/item/1005003539417753.html
white - https://www.aliexpress.com/item/1005004487154077.html

Cooling fan
TE Connectivity Econoseal F(176146-6)
https://cfmotousaparts.com/product/cooling-fan-cfmoto-oem-9010-180200-3000/
https://www.te.com/usa-en/product-176146-6.html

Mates with M(176143-6)
https://www.aliexpress.com/item/1005004872619261.html


Tail lights
Sumitomo HMS (HM Sealed)
Tail-light vehicle harness, 4P, female 6180-4181
Tail-light, 4P, male 6187-4441

https://www.aliexpress.com/item/1005005805924486.html (part number typos in description)
https://prd.sws.co.jp/components/en/detail.php?number_s=61804181

Other useful info:

6 pin HWS (SW Sealed) series F(6189-0133) M(6181-0074)
https://www.aliexpress.com/item/1005002376696893.html

Sumitomo connector series overview:
https://prd.sws.co.jp/components/en/index.php

Sumitomo HWS (HW Sealed) series catalog:
https://prd.sws.co.jp/components/series/pdf/en/hws.pdf

Sumitomo MTS (MT Sealed) series catalog:
https://prd.sws.co.jp/components/series/pdf/en/mts.pdf

Sumitomo HMS (HM Sealed) series catalog:
https://prd.sws.co.jp/components/series/pdf/en/hms.pdf

TE Connectivity Econoseal catalog:
https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Catalog+Section%7F1654365_Econoseal%7F0911%7Fpdf%7FEnglish%7FENG_CS_1654365_Econoseal_0911.pdf%7F176146-6

Other connectors:

Sumitomo MT series catalog:
https://prd.sws.co.jp/components/series/pdf/en/mt.pdf

Sumitomo TS series catalog:
https://prd.sws.co.jp/components/series/pdf/en/tss.pdf

Thanks for all the detailed research and the extremely useful links!

update: tail-lights added.