The rats nest has got to go😁
As well as the bare copper-you never know what could land across them to cause an issue..better safe than sorry 😁
As far as the MTH Terminal board..
for $25 it’s overpriced in my book
You can buy Electrical Ground Lug Strips cheaper and get more terminals..
I built this ..
Because I got my Z-4000 used-and very cheap, because the display is damaged and too expensive to repair -but the output is 100% accurate
the Amp meters were $15 each
and the 4 bus bars were about $20
And I can terminate 11 feeders on each throttle
You can get these bus bars at any home center…
Im redoing my set up, to add individual on/off toggles for each feeder…plus an in-line fuse to add engine protection
I like the square drive lugs…they provide great secure mechanical connection
Good luck