In a radar environment, you can pretty much assume that the tower controller will issue specific instructions upon missing the approach. Just let the ATCO know, "xxxx, Missed Approach" and you should get something like, "xxxx, Fly runway heading, contact approach on ....." Yes, if you lost all radios, fly the published, but the published is just about never used in radar.
I was an IP at an AFB near a civilian airport and tried to fly the published approach for training and the controller couldn't approve on three requests, "due traffic". Flying the published miss might get you closer to traffic at a lot of airports than just going straight ahead.
GF