Those combo fusible links are just blade connections underneath and pull straight out, but they can be very stubborn and there's no good way to grab them. I usually spray some WD40 or PB into the sides of the socket and wait 5 minutes, then gingerly pry them out by working the sides up a millimeter at a time with a small screwdriver. Once you have them out, you can test the individual circuits by jumping the ammeter directly across each set of pins. However, keep in mind that when you do that, it will POR the devices attached to the circuit and it may take time for them to "sleep" again. Generally the only ones that don't have "sub fuses" underneath them will be a 50A for the BCM and a couple of 30's or 40's for the ABS. As I already mentioned, the BCM won't hibernate again for a full 30 minutes. That can be the case when pulling individual fuses, too, which can make it very frustrating.
Speaking of fuses again, I presume you also checked the ones inside the car in the cabin fusebox? Things like the RKE Receiver are generally fused off those and can be responsible for draws, since they're backup-powered even when the ignition is off just like the AV and BCM.