Its fine to just daisy chain a flying bus cable, as long as the power supply can provide enough amps, and the it won't be a problem (the same goes for AC power strips, although if ur already using up the power, obviously you can't magically get more by adding another) I reckon it might be better to install a passive bus board, I just looked in the manual and theres mounting holes for a few different manufacturers' bus boards. They're still pretty cheap, and lots of people prefer them for noise/convenience reasons, it's a bit nicer to plug modules into a fixed port than one thats dangling on another cable. But yeah daisy chaining them is fine and won't cause any serious issues