For what it's worth - this does not work on all vehicles, and if you check the FSM for whatever Suzuki you're driving, you'll probably find that Suzuki recommends against it.
The Grand Vitaras have a shifter "extension" that allows the shift to sit several inches behind the transmission (actually over the transfer case), and there's no way you're going to refill the transmission by pouring oil through that - so essentially you have two options, cut a hole in the side of the transmission tunnel opposite the fill plug, or, get underneath with a pump.