Hi,
The datasheet is as clear as can be.
You (the designer) should know at which IC you connect pin4 to GND....and at which IC pin4 is connected to VCC....
There is nothing unclear...
I assume you did not draw a simple schematic....
If you did .. you know which IC is which.
If still unclear:
--> draw a schematic and post it, so we can discuss about it.
Klaus
Added:
Sorry, my previous post was wrong in one item: the ADR pin is inversed, thus
* if ADR = 0 then slave address = 0010111
* if ADR = 1 then slave address = 0010110
Klaus