Current plan is to dig a hole in each of the beds on either side of the path, then use a long sds drill bit to make a hole to run the cable through, or possibly some small conduit then the cable through that.
God looking at these photos makes me long for the spring so I can replant the beds.
I'm completely not getting what doing this actually does but I like a challenge and had an idea.. grind a channel through the brick path , house the cable and lay it in cover with cement mixed with not much more than water, re-score the brick lines.
Do you know how deep the concrete is? Dig a hole next to it and see if you can just run it under