I hesitate to post because I hate to discourage DIY projects, and I'm sure you put a lot of work into that. And I have an obvious conflict of interest because I've sold a lot Type 1 & 2 to Roadster connector cables to European Roadster owners (CE tested). I've also sold a lot of CAN JR adapters to use with your Type 2 to Type 1 32A cable.
But I have to say that m0rph is absolutely correct on both counts. There is a cover to prevent electrocution but what's to prevent my 4-year old from removing it when you're not looking? I know it's unlikely but the results would be tragic. And I don't know if that's worse than pumping 60 or 63A through a T2 to T1 cable that's rated for 32A!
Since I don't want to discourage your DIY spirit, I'm going to strongly urge you to please put a latch for a padlock on the covers of the unused sockets, and build a custom cable capable of 63A and rated for 105C.
Small correction hscharp...
morph is correct on 32 amp, but he never mentioned the cover.
Now I'm not an electrician or physicist or electrical professional but I see things that really concern me, and as such should be shown to a qualified electrical professional prior to your using this or any home made device(s)..
I am very concerned about a LIVE outlet with up to 70 amps and at least 220V, cover or no.
This unit has no on/off to the un-utilized port, and I believe that is a serious and life threatening flaw. I don't think you should use this unit.
In general it is NEVER a good idea to provide power to 2 ports when only 1 will be utilized.
I believe several changes are required, not limited to:
I also agree that a circuit that may see 72 amps should not be using 32 amp wires.
I suggest stout wires and fuses or circuit breakers.
I also suggest 2, rather than one box... One for Level 3 and one for Level 2 charging.
I suggest water proof well insulated and well grounded cases for any project involving high current and Voltage.
Finally, I believe your original unit is unsafe and should be disassembled and never used.
My humble suggestions.