Are the Orange and Yellow/Orange and Black wires in the first picture soldered directly to your sticks? Are those monitoring your vCore?
Another question, why kind of thermal interface material are you using? Thanks for posting the pics, that is a great idea to put these inside the PC case.
Yes, those wires are for vcore readings. They don't actually connect to the motherboard though, just my voltmeter. I still had some thermal paste (cooler master and arctic silver) left over from when I built my pc. Those bitmain chips are tiny compared to a cpu, you don't need much.
I was also thinking of getting one of those fan controllers/displays that fit in your drive bay to monitor temp and fan speed, or one with a custom display that would also display the hash rate and best share, but those will have to wait until one of our 'lottery stickets' comes through.
.earl