the monitor will already have a cable associated with it.. unless no1 has scabbed it. for projectors alot of the cables are VGA, you already haev a dvi-d to vga connector so thats easy. if its a dvi-i or dvi-d cable your fine aswell. you might need to get the hdmi connector and cable tho.
it might be good to get the dvi-d connector, it is backwards compatible to dvi-i i THINK😕