I don't believe this will work.
You need to connect the 888 to a DSLAM, I don't believe you can connect them back to back over copper. Long ago Cisco used to sell LRE (long range Ethernet) kit that could do this - but no more.
I don't believe there are any current Cisco products you can use to solve your problem.
However you could may be able to run a WiFi bridge link using Cisco 1532's ...