9.5kw battery wall mount

I have 2 x 9.5kwh batteries that I would like to wall mount. The instructions say the wall must be a minimum of 120mm thick and the holes need to be 75mm deep. My wall is a cavity wall and the external bricks are 105mm deep. Does anyone have experience with this type of wall and should I not do it? Or will it be ok?

I have two 9.5Kw batteries which are mounted on a cavity wall and just used decent Rawlbolts. I thought the batteries came with a pack of bolts to mount on the wall but maybe wrong.

Ortwin I wasn't left with the Gen 2 battery bolts, the instructions say to use M12 Explosion Bolts.

The Gen 3 battery has come with M14 Expansion bolts in the box.