Teflon print bed top surface, below is an aluminium sheet with a 24 Volt 300 Watt head pad stuck to it. Below this some cardboard, (for now), that gives space for the heat pad wires. Below this is some thin cork and two more sheets of aluminium with levelling bolts screwing into them.
4×
Tin Plated Crimp Ring Terminal, M4 Stud Size, 16 → 14 AWG, Blue
I used Insulated ones but Non-Insulated ones will save you the time of removing the Insulation