Help: HSMC and I2C

I don't have schematics or other documentation of the said daughter board. Technical, you can place the pull-up anywhere at the I2C bus. This results from the fact, that the resistor value is high compared to trace impedances.

I guess, there should be a place, where you can solder an SMD chip or leaded resistor. I also don't know, why the board designers didn't think about this issue. But there's definitely no software method to replace a regular I2C pull-up, except for considerably slowing down the transmission speed, as said.