You can now view various connected accessories within the Activity Summary as shown here
Once finished with an activity scroll to the bottom of the Activity Summary to find the connected accessories.
To connect your accessories to your watch go to Settings and scroll to Accessories
You can then choose your device and/or heart rate monitor to connect
The watch will indicate it is searching for these devices and should look like this
Once the devices are connected, you'll see the various devices connected to watch as shown below