Dell Latitude 14 Rugged - 5430 Laptop (Memory RAM Upgrade) Memory slots are under the motherboard. You need to disassemble almost the whole laptop to remove the motherboard. Disassembly Add Memory RAM Reassembly
Just did this today, everything is back together and I have more RAM but I noticed my USB-C on the right side (opposite of Fan) isn’t working, DOH! Need to open it up. And check that ribbon I suppose. 🤔