What controller? Here's the external bus pinout for the SSD1306:

I'd recommend working from the controller datasheet rather than the panel; it looks like the panel just runs the controller bus to a connector.
Oh, and if it's SSD1303 or 1306 I'd say forget I2C and use SPI instead. These are hella flaky using I2C and will randomly lock up on you, for no apparent reason - clean signals, clock independent, etc - the interface just dies, wedging your bus and they will need to be reset. Can't clock out of it, so it's not a lost clock.