These connectors are made by a number of manufactures, but all will fit into each brand provided the style is the same. These are extremely common in Western Australia, as once required by Law.
There are 5 main styles:
7 pin flat.
12 pin flat (which also accepts the 7 pin flat)
6 pin small round (becoming outdated).
7 pin small round
7 pin large round (mainly vic and SA use).
If it mounts on the car it is a CAR socket , if it is on the front of a trailer or Caravan it is a Trailer Plug (regardless of male or female).
Most photos show BRITAX brand, however ARK are very similar. 1 year warranty.
SpecificationsModel: N82022BL Cool Drive, CY-20271125, 20271125Brand: NarvaShipping Weight: 100 grams.