Oh right and welcome to iis.
EQMOD is a community ascom driver for eq5/6 mounts. The dongle replaces the handset so you have a direct link from your pc to the mount. I think selecting pc-direct bypasses the handset and makes it act like a dongle. Bintel sell the
dongles. eqmod is also a hub so multiple programs like the sky, stary night, phd etc can control and talk to the mount at the same time. So eqmod turns your pc into the handset.
You will need
ascom installed before eqmod. There is an
article on this site showing how to do it using free planetarium software. This guide is 12 months old so the software versions will have changed. Just use the latest I would think.
I'm pretty sure that DetectPcToSynScanConnection program is to check for a connection to the handset before you flash it with new firmware. It does not confirm a connection to the mount, just the handset. ie: it will work with the handset unplugged from the mount. That's why there is a dc in socket on the handset.