Thanks Buddy!
Unfortunately, the belt on both pillars are fixed and the end of these belts have a metal plate through which the belt is looped. On this metal plate is a small lock device which looks like an upside down nail head, How does this locking device attaches to the retractable belt and then locks into the third belt is not understandable. I saw a similar three point seat belt system in a vintage Mercedes Benz. some days back. What I saw in the Mercedes, the metal plate through which the floor mounted retractable seat belt loops through, had a 'Key-Hole' like provision' to Hook the upside down nail like device on the pillar mounted seat belt - the KE 20's seat belt has no such provision. So, I am still seeking help from other members of this forum.