prakesh, what car are you driving? the R33's have the jumping point in the engine bay! thus not going anywhere near your battery direct. the picture on top of the relay box on the drivers side displays how to hook the leads up! cant be bad if they show you how!!!
had similar issue in my car a while back
spent 2 days in an autoelectrician measuring load in amp on the battery wirth the car off, at some points it was almost 5 amps- which is huge. shouldn't be too much more than 0.5A. then disconnect one thing at a time and measure - stereo, alarm, even my turbo timer was drawing 1.3A when plugged in and not running!
just a few ideas
CT