I have a 3/4 h.p. 3450 rpm booster pump that has 3 wires going to my timer box. I need to know where the 2 blue wires and 1 green wire hook up to timer/elctrical box?

It looks like they connect to the 2 unused terminals nearest their stripped ends. Load side of timer 2.
Manually turn on timer 2 and see that you have 240 volts at those 2 terminals. The first and 3rd terminals from the top right side of timer 2.