the to/from ports section is for connecting to touchosc/lemur only so don’t worry about that.
i know it’s confusing, (trying to make things more understandable, so your feedback helps!), basically what’s happening is if u click ‘zeroconf’ in the setup tab, it’ll swap the default connection box with the alternate one you’ve installed (serialosc-zeroconf.maxpat). the one in the gridlock folder actually does not use zeroconf, it uses a newer protocol ‘vserialosc’ and does work with 64-bit. only the one in the Pages folder uses zeroconf (and is 32-bit only)
the only reason they have the same name and are both labeled ‘zeroconf’ is so that there wouldn’t have to be two separate buttons on the interface. (one for pages users and one for gridlock.)
i don’t own a LP / never downloaded gridlock so unfortunately i can’t help much there (maybe other LP users can chime in?) all i really know is that if you have your grid setup properly in gridlock, it should show up in re:mix’s connection box (if you’d installed the serialosc-zeroconf.maxpat and enabled zeroconf in the setup tab.)