Cellphone adaptor for 30mm ocular lens for microscope

We bought this microscope 8years ago, it came with a poor ccd with VCR connector. Since the original shop is closed now, I don't know the correct type lens to replace the CCD lens for camera. The most simply way is to add an adaptor with the ocular lens.

My ocular lens is 30mm version like attached image. The green color part goes under the ocular lens. And the red and yellow part go with the cellphone for adjust the position for the cellphone camera. Need to remove the rubber top piece on the ocular lens for the adaptor.

Instead of use threaded insert nuts, I use 2pc of M3 hex nuts(2mmX6mm) . And I pause the print and add the nut . This make it more reliable for the cellphone mounting.

Parts we need besides filament

1.  2pcs of M3 hex nuts (2X6mm)
2.  2pcs of M3 screws (at lease 6mm length)