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.
The purple boarder bits are definitely cemented in. The main bit of the entrance path probably is.
But mainly I don't want to fuck it up.