How to detect if the arduino wire is still connected I have hall sensors connected to an arduino, because of mechanical movements there is some possibility that the input wire may accidentally slip out of the arduino analogin sockets. Is there any way I can detect if the wire is still connected to hall sensor  ? I don't want to solder the cables yet.
You can maybe try to see if the value on analog pins when sensors are connected (while not sensing anything) is different when not connected.
Depending on your sensors and schematic, if analog input is fluctuating, you can use this command to use pull resistor to avoid this fluctuation.

digitalWrite(Ax, INPUT_PULLUP);


If the above gets true, then you can set up a threshold for detection. Below or beside threshold value, sensor is unplugged.

Otherwise, use some vinyl duct tape.... this would securize the thing a bit!