batt drain help. (alt)

[ooimpalaoo]

ok so i have a 71 k10 new bat new alt. if i leave the batt hooked up over night it will be dead when i get up to go to work the next day. after going throught all the wires headlight switch, ignition switch, starter cable, draw test, going crazy i did the simple thing and disconected the wire going from the batt to the alt now in not getting the spark that i was when i was hooking the batt up..... soooo im guessing that is it....now wtf is going on????? i was told somthing about a regulator?? wtf is that and what does it have to do with the alt? please help me out im so sick of removing my ground wire every night.. thanx