After much searching, I decided to create my own filament connector. The idea is simple: you need to wind about 10 cm of nichrome thread on the tube from the 3D printer (you can take it from an old soldering iron).

We connect using any buttons and through the motor voltage regulation board. Select the heating time and voltage yourself. I have 8 volts at the input, the filament heating time is about 10 seconds. You need to press in both rods and turn off the heating using the button on the front panel.