Wiring diagram for two SSR's & 2 x heating elements

Hello I’ve done some searching but found nothing that looks to be relevant ?

I have a 100L stainless steel vessel that has two 3500W heating elements fitted, I’d like brewblox to be able to control these for mashing & boiling.

I have the brewpi spark set up at the moment controlling two FTSS pumps/heat cones.

I bought two 40A SSR’s with the heat sinks, I have two dedicated 15A power outlets, so now I just need a wiring diagram to get it all wired up?

Can anyone help?