WiFi for F5S

Is there anyway of setting up WiFi if I skipped the step in the G Express setup/install (can't even remember seeing it). Some posts have referred to forcing connection through the watch via "Settings/Wi-Fi/Connect to Wi-Fi" but I don't have that option in my settings on my watch!? Am I looking in the wrong place?

PS - I've only had the watch a few hours so don't know my way around yet. I searched WiFi in the manual and it didn't return any results?

Tks