Using GPIO on modern evaluation kits

[Altera_Forum]

Hi, 

 I'd like to to use the GPIOs on evaluation kit/ development board. My project require connecting them back into the FPGA. Is there a possibility to solder/connect those pins on ? I consider using dk-dev-2agx125n (dev. board for arria ii gx), and it is not clear how to connect to those pins.  I also would like to evaluate FPGA performance with different core voltages. Is there elegant way to do it on evaluation boards?  Thanks :)

[Altera_Forum]

there should be an HSMC to 40 pin header daughter card that comes with the dev kit 

 how do you plan to evaluate performance with different core voltages?