The IC-7300 has only a 13 pin DIN connector. You would need create an adapter with the 13 pin DIN pigtail that came with the rig. If you no longer have (or never had) one, the MFJ-5213 will work for the rig end. See the pinouts on page 12-1 of the IC-7300 manual.
From: firstname.lastname@example.org <email@example.com> On Behalf Of Julian OH8STN
Sent: Thursday, April 11, 2019 12:22
Subject: Re: [nw-digital-radio] fldigi with DRAWS #draws #fldigi
It sounds like you're running the 7300 from its internal sound card (audio codec) via the USB port, rather than from the DRAWS hat. You must connect the DRAWS hat to the 6 pin mini-din on the rear of the 7300. Then select the DRAWS hat as the audio source in fldigi, after its configuration.
Apologies if I misunderstood your configuration.