I have in front of me a Tamron2 adaptor and Tamron2 lens. The lens is a 500mm mirror lens. The lens mount has green spots to align with a green spot on the adaptor mount. The the lens mount has a small lever that extends radially out of the lens mount about 2mm and is depressed to unlock the mount - it is almost diametrically opposite the green spot, but offset a little. At right angles to the green spot, on each side of the mount is a small notch extending down into a rim of the lens. The notches receive corresponding projections on opposite sides of the adaptor. The projections extend at right angles from the mount towards the lens.

Hope you can tell what your lens mount is from this.

Cheers

Fred