Hello tateerrzz! I'm a new snake owner too! I've fed my snake a whopping two times already
From my perspective, I wouldn't worry about it. If they understand where the heat is, they'll go to it if they need it. Be sure to give them space when they're digesting and to not handle them for 24-48 hours after feeding, in order to make them most comfortable and feel at ease as they digest their meal.
But if you really think they are getting too cold over there, maybe place a heat lamp if you've got one (I suggest no more than a 60 watt bulb) over either the middle of the cage, or the cold side if it gets just freezing over there. However, I personally wouldn't do anything. The main thing is that your beauties are eating! That's fantastic!
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