You need to get a data sheet for your accelerometer and read it.
there are vcc, gnd, scl. sda, xda, xcl, ado, and and int connections.
If that is true,
three of these go to A1 A2 and A3 because they are what transmit the analog signals
The that is not.
What is the part number for the accelerometer? There is probably a library to make using it easier.