You need to know that candles for health and candles for the repose are placed on different candlesticks. Find out the candlelight for candles for the rest is easily by an excellent feature — it has a square shape. You can put a candle with any hand, the main thing is to do it sincerely and with a prayer for who you put it for. If you are not sure that put the candle exactly where you need — do not be shy and consult more experienced parishioners.