Help!

We are getting a Combi Connection this week for our baby (due in 6 weeks), and were planning to get two bases, one for each of our cars. I have a Toyota Highlander (2004), and DH has a Volvo S60 (2003). I was under the impression that cars this new all have LATCH, but is this not the case for the Volvo? I checked in the owner's manual and saw nothing about LATCH, and it seems from everything I found that you have to install it using seatbelts. Is this the case? We will probably be travelling in the Highlander most of the time, but how can I make sure that I install the carseat in DH's car correctly?

Thanks in advance!