thank you for responding 🙂
yes i mean the full electroniques are missing i have Ultimaker original with no heated bed
what i have mounted now are : 4 stepper motors, 6 endstops,2 cables for lcd, 1 tempeture sensor for the extruder, and 2 fans (one for the extruder and the other for the missing board v1.5.7), and 2 lcd cables
here's a picture that could be helpful