I'm looking at Konq 3.4 right now, and it definitely has a google bar next to the main location bar.
Configuring it is done by right-clicking in the toolbar area, and selecting "configure toolbar". You should find what you're looking for in the combo box at the top of the configure form that comes up.
Alternatively, most default installations of Konq allow you to do a google search by typing "gg:" into the location bar, followed by a search string. No need for a separate field for google.
Hope that helps.