Good idea and effective to chum them as stated to an odor attraction of conductivity, particularly to the sides of the fence that will be tested the most with random attractions in other positions to cover all the bases. They learn pretty quick without additional attraction but a good recommendation to really shock them good.
I usually buy a roll of chalk string and soak the needed length of string in a small jar of fish oil. Remove the string pieces and let them drip over nite. Then I wind wrap sections of the soaked string around the wire tightly and zip tie it to the fence strands at about 10 ft sections at a time at both levels of fence. Now they are drawn to the fence with their noses. Guess what happens next.
Now nothing is left to chance.
Bad deal is, anyone trapping coon come fall with fish oil in the proximity of the conditioning areas might not get very good attraction to fish oil odor products due to this type of treatment. However the oil will last for weeks to months at a time depending upon wind and UV conditions.
If needed the string can be treated by shutting the fence off or detaching the leads from the charger. Then saturate a rag with fish oil again and run the saturated rag down the string runs to rejuvinate the odor for another period of time.