Anyone got Babystyle Oyster Car Seat? help!

[honeysuede]

So for my DS I got the babystyle Oyster 3 in 1 travel system. It was fine & we plan to use it for DS2. We have washed all covers etc including the car seat cover which meant taking the straps off - now I can't for the life of me work out what straps go where on the car seat and I swear we have one missing & there is nothing to explain this part when I google it does anyone have the same car seat and know how to put the straps back on and more importantly can explain it to a silly preggo xxx