First of all what modchip do you have ? If its a Modbo 3.0 then it should work no probs. If its an original Matrix Infinity then there are mixed reports so you might have to solder it back. Or like l_oliveira said, add a 10k resistor or something. But I cant vouch for that.
And most of all dont touch it if you dont have the skills to solder it back.
A pic or guide isnt really necessary as there is only one wire that is conected to the RESET/Power section of the PS2.

