Foam cannon fitting?

[top189h]

I was recently given a new to me pressure washer that has an unbranded accessory handle. I was looking at getting a foam cannon and need help figuring out which fitting would fit. the fitting is an inch and a half tall, the locking areas start half an inch down from the base and the head at the inlet is just under a half of an inch wide. After the first half of an inch the body grows to just under 3/4 of an inch. I will upload a picture shortly.

[top189h]

This is the fitting. It resembles a bosch to me personally, only without the filter looking part on the end where it would meet the cannon.