Shoutout to "Bull Dog" for finding the connector part number!  That wasn't easy.

Haidie (yqwakan.com)

12S ("HD202")(M6098-4589):
https://www.yqwakan.com/product_8258_AutoWiringHarnessElectricHousingConnector60984589.html

https://www.aliexpress.com/item/4000906238501.html?spm=a2g0o.store_pc_allProduct.8148356.14.17012fc9j7dxgb



18S ("HD281"):
https://www.yqwakan.com/product_7737_autowiringharnessplugcableelectricunsealedplugconnectorHD281072211.html

https://www.aliexpress.com/item/4000265656537.html?spm=a2g0o.productlist.0.0.32e242db7hOdvD&algo_pvid=a6a5434e-fd09-4a5c-b7b5-11ec6cdfd513&algo_expid=a6a5434e-fd09-4a5c-b7b5-11ec6cdfd513-16&btsid=0b0a555916220955166888686e56b2&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_


...



http://www.hdconnectorstore.com/productdetail/3156.html