What connector?

[Ed21]

Got what must be a simple question. 

I've got three SWA 3 core cables that are already fixed and run into a external waterproof box that now need to be joined.
Just had a look on CEF and Screwfix and their are a lot of options, so what is the current/best fave for joining 3x 4/6mm single cables?

 

 

[TonyT]

Wago connectors

 

 

[Ed21]

Cheers, reckon one of these will be man enough. 

https://www.tlc-direct.co.uk/Products/WA613C.html 

[Russell griffiths]

Isn’t this something your electrician should be specifying 

[Roys]

Wago’s sized for the 6mm will work well,  presume the cable will be properly glanded and banjoed / piranha nutted to ensure that the armour is earthed and continuous between the cables.

[Ed21]

14 hours ago, Roys said:

Wago’s sized for the 6mm will work well,  presume the cable will be properly glanded and banjoed / piranha nutted to ensure that the armour is earthed and continuous between the cables.

Yep, IP65 plastic junction box, external glands/banjos with armour earthed along with the earth in the 3 core for continuity. 
The source and destination of the cables also have a separate earthing rod.