Flat cable chain mod for Anet A8

I printed out and installed Starwhooper's Improved Linear Chain to Extruder on Anet A8 (https://www.thingiverse.com/thing:1905344) and also davbarr's Z_Motor_Fixation_Chain for Anet A8 (https://www.thingiverse.com/thing:2055872).

Like a lot of users the chain would pop out of the z-axis mount and curve upwards and not stay flat and parallel when the x-axis carriage was moving. So I designed this mod, to hold the chain flat and parallel when attached to the z-axis mount.

It uses a mediu