I would say that you should not label them. In fact I believe it's mentions somewhere, or it may have been just at the retreat.
A label carries a lot of judgement with it. You are trying to fully experience the feelings without the conscious mind influencing or limiting your experience.
I would think that seeing is alright. Hearing the feeling is find too, so long as your not hearing words originating in your mind.
Don't worry about it if you do some labelling or talking / describing it to yourself. It not wrong. It's just a good - better - best 
thing. If I find myself labelling or verbally describing, I just smile at myself and try and just feel it.
Everybody is different, and each time is not like the last. What you do with each feeling exercise is absolutely perfect... for you.
You are perfection.
Iam2 
