Yes indeed, do that. The primary concern for a new trainee here is perfect and consistent (meaning not varying one rep to another) technique in the lifts. The people who do not pay attention to this training principle never--EVER--make good results because they get impatient. So in regards to your original post, it doesn't matter if you won't be doing much weight :).
I tend to like doing technical lifts when freshest, because it is easier to stay consistent with technique. If you are a rookie and tired you will seriously compromise your long-term goals by ruining technique trying to learn or perform lifts when tired from strength work.
So you should do them first.
For someone whose squatting strength is the limiting factor, it is probably ok for them to do their squat work before the lifts--IF they are already experienced and have rock solid technique that holds up under fatigue. Some of the big dogs have advocated doing this from time to time. Or say somebody whose jerk suffers due to strength problems with shoulders, not technical problems with the drive and recovery. But I wouldn't really feel comfortable doing it this way long term personally. To paranoid about some technical thing going wrong and not being caught before a bad habit is established.