sensor pins to arduino
GND goes to GND arduino
VCC (right) goes to 13
VCC (left) goes to 12
1 goes to 3
2 goes to 4
3 goes to A0
4 goes to A1
5 goes to A2
6 goes to A3
7 goes to A4
8 goes to A5

l298n (motor shield/controller)
enable A goes to 5
input 1 goes to 6
input 2 goes to 7
input 3 goes to 8
input 4 goes to 9
enable B goes to 10


PS-
Perhaps this is the reason why my sensor QTR-8C does not work
since there are some pins that connect to digital pins and others that connect to analog pins.