Summary

The original joint has a (black on photo) 90˚ vacuum connection. For me not useful. So I made a (white) 0˚ connector. Made in Tinkercad. Second stl file is updated version.
Edit it online https://www.tinkercad.com/things/gfjzuuSnSvE

Print Settings

Printer Brand:

CEL

                                            <p class="detail-setting printer"><strong>Printer: </strong>                     <div><p>Robox</p></div></p>                                                                                <p class="detail-setting rafts"><strong>Rafts: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>0.3</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>100%</p></div></p>                                                    <strong>Filament:</strong> - PLA                SnowWhite                    <br>                        <p class="detail-setting notes"><strong>Notes: </strong>                    </p><div><p>Any material does the trick.</p></div>

Proxxon BS/E zero˚ vacuum connection