Belgaum's Exact Opposite Point on Earth is in South Pacific Ocean

If you start digging, a straight tunnel from Belgaum and reach the exact opposite point on the Earth. Now how do you locate that place on the globe where that hole will open?

AntiPodr, this site takes you current street address (or city name or zip code) and points you to a location on the Earth’s surface that is exactly opposite to you.
Belgaum's Exact Opposite Point on Earth is somewhere in South Pacific Ocean.Any takers for digging the tunnel.