that is looking really good !!!

but how do you connect the tubing from the motherboard area to the tubing in the lower compartment (I mean which fittings and connectors) you see it very often that people are running the loop through mid plates and that kind off stuff and every time I am like ''wait, what! but, How''

can you please solve this mystery for me because I don't know what to do any more for years I am studying this ''running loops through mid plate's'' phenomenon but never have I found the secret

can you please share you secret?