3 +1 monitor configuration

[cruzinZ]

My current setup has three Asus VG248QE hooked up through DisplayPort to dual GTX 970's running in SLI. I have added a VE278Q monitor as an access monitor. This one is not hooked up yet. The DisplayPort on this 27" monitor is bad as the reason I received it for free. The VGA & DVI HDMI ports still work. Which port on the graphics card can I connect this access monitor to? I would like the ability to run four screens when not gaming. I don't plan on using the access monitor while gaming as it's a different refresh rate and don't plan on fighting with the software to get them to work in games.

Thanks!