You cannot splice O2 sensor wires!!
You have something badly wrong as 1.1bar is only a c*ck over standard and you are forcing it by using an MBC to get it
You should be able to get 1.3 easy without a MBC if the engine and components are running properly.
You can`t jump any procedures to get a result you may even get engine damage over a short time because of the wrong AFR`s the MBC is giving you.
Still everyone to there own!