As @kn_khipk requested, posting the pics for more clarification:
The pedal is to be depressed and locked in this way. Its easy, just try it and you'll know. If the jack tends to slip, just put something over it and it won't slip.
I recommend to lock the jack on the floor mats because most of them have these kinda small protrusions underneath them which will provide some extra support.
This is the main "T-Bolt". It may be located anywhere on the pipe that leads from the CNG it to the air filter box of the car.
The gas inlet to the engine looks like this. If you're facing problems regarding CNG, check this point for loose fittings or leaks. Its usually fixed with an adhesive material known as "magic". It gets weak with time and may break off with jumps and the pipe leading inside may become loose.
This happened to me, thats why mentioning it.
This small guy here is the Idle Adjustment Screw. Opens counterclockwise and closes clockwise (WRT the kit itself) You'll know that its opening or closing because of its significant motion in either direction.
The CNG kit as seen from above. IAS on the left.
And lastly, these kind of screw drivers can be used to calibrate/turn the T-Bolt. I used the longer one, and came to know for a fact that the longer the tool, the better the precision in movement.