I-candy peach - double up with a car seat

[EverybodySayCheeze]

Maybe I’m an idiot, but this just seems so complicated - hoping someone can help.

I have an icandy peach single and have a new baby due any day. We want to be able to convert it to a double buggy but with the original toddler chair and a car seat (cybex) - so not worried about the bassinet and therefore don’t want to buy the £300 extension pack on the icandy website.

Has anyone done this and can they tell me what converters I need? It’s so confusing. We ordered what we thought we needed (lower car seat adaptors) but these don’t seem to be the right thing????

Please help