want to do training in an automobile firm or engg firm

hey
M a student of mech engg and just completed my 3rd year
Its mandatory for us to go thru an industrial trainin aftr 3rd year
I wanna do it frm an automobile firm or frm engg firm as it is my interest
Can any 1 help me out??
How shuld i cntct the companies??
What is the procedure??
If its in gujarat then it will b better for me