So I've finally started trying again to connect the efergy engage hub solo kit I got a year or so ago to our smart meter but the wires aren't that accessible currently. See the pic attached for an idea. If any of you have some suggestions they would be appreciated. 

I managed to connect the CT clamp to the left wire but it was obviously not the right one. According to the documentation it's meant to be the right most wire but in my case there is just 3 wires that don't have much give there. If I managed to connect the CT clamp around all 3 would that matter?