Conversion/decommissioning from CNG to petrol v70 2.0 T, BJ 2013

Moin moin. Now that several times my gas bottles or the valves of the bottles cause problems, I want to dismantle the whole CNG technology and drive only on petrol. I can do that, only the injection of the gas side into the cylinder I have not yet on the screen. Who can help me with word and picture? Is there a T-piece in front of the petrol – injector or what is there installed? Greeting Dirk