OK some HELP PLEASEEEEEEEEe!!!!!!!

I have the BJCS and have had it for a while for my bubba who is now 1, I have another bub in approx 3 weeks so am getting everything out to get ready.

I have the Safe and Sound unity (been in box since I got it) as it is listed as 1 of the 2 car seats that attach to the BJCS along with the Peg P.......

So I get the Car seat adapters out and the instruction booklet and try to follow the instructions to attache the unity to the BJCS. This is the set that came from America with my stroller.

I have to match the SnS Unity to either the Britax Chaperone or Britax Companion which I do by the pictures.

But no matter what DH or I do we cannot get the adapters to fit up the inside of the car seat and click in?

Ok so have I got the wrong adapters, maybe so I order another set from an AUssie site that states they go with the SnS Unity.

Get those delivered today, get all excited that it was the wrong ones last time and these will just be so easy and the car seat will just clip on.

Open package, assess adapters......NOOOOOOOOOOOOOOO, they are exactly the same, I had the correct ones in the first place.

So im hoping someone out there has this and can help with the following?

1) What Britax seat does the Unity match the Britax Chaperone or Britax Companion ?

2) does the unity just rest on the silver bar around the back of the seat that goes into the side adapters or is it supposed to click right down so the little arc bits with L and R on are up under the sides?

3) did you struggle????????

Will try calling BJ directly for some guidance but anyone out there using it already pleas can you let me know?

THANKS