I'm not sure if this is just a visual thing but if you have a line of AE2 cables then place a compact machine next to one of the cables, the cables won't connect. But if you place the compact machine then the cable, it's fine.

I'm using the DNS techpack, AE2 version rv1-stable-1 with CM version 1.10

The cables should connect after you entered the machine. Please recheck.

I placed a line of ME Glass cables, a compact machine adjacent the line of cables, teleported in then out. Cables still didn't connect.