It's not a triple. BB spacers are simple. They fit on the drive side between the cup and the frame.
I wouldn't space much more than 3mm as you need enough crank spindle on the non drive side to catch and tighten the crank arm onto. Can also add a 1mm spacer behind the cassette.
I realise all this affects q factor and chainline but you don't have many options.
It's not a triple. BB spacers are simple. They fit on the drive side between the cup and the frame.
I wouldn't space much more than 3mm as you need enough crank spindle on the non drive side to catch and tighten the crank arm onto. Can also add a 1mm spacer behind the cassette.
I realise all this affects q factor and chainline but you don't have many options.