^ This is why I've decided not to even mess around with the balanced outs on my TT2. Aside from not really needing it with my current setup, there's just too much possibility for a potential error in wiring and frying something, which I've read about others actually doing.
I have been in exactly the same thinking as yourself. … I used RCAs plugs to make my adapters to speaker cables.
However I always worried about something metallic falling behind my TT2, since it's on a desk. If something metallic shorted pins 1 and 3 of the XLR sockets, then I would be in trouble.
I did get around to buying some XLR plugs, but then didn't use them. Then tonight I started to change the cable on my RCA to speaker plug adapters. Since the existing cable was just some any-old copper cable. I bought some Audioquest Rocket 22 to use, so I had some proper audiophile quality adapters.
Anyway tonight, with thicker cable of the Rocket 22, I could not get the wire into in the RCA plug. I tired loads of times. My RCAs have some screw in to clamp the wire. I maaged to strip that, making my RCA only solder usable. However overall it was just to tricky, to get meaty copper strands into a tiny RCA plug.
I got out the XLR plugs that I bought ages ago. I looked up the wiring, and the XLR pin-diagram. Now I have looked at it with the wire and the XLR plugs, honestly it could not be easier. Connect 'red' to pin 2, and 'black' to pin 1. (Then at the other end connect 'red to the red speaker female, and so on.)
I will very likely solder the wire to the XLR plugs tomorrow when I have daylight. The beauty of XLR though, is that when we use pins 1 and 2, it naturally pulls the wiring apart. Like in a Y shape. (Have a look at a diagram.) Whereas with an RCA plug, it means laying one wire over another. Meaning you have to manually insulate one from the other. Either by tape, or making sure to strip the plastic coating just right. Also making sure everywhere is not shorted, with even a single strand of wire. Plus that sheath that goes over the inside to break connection with the jacket. Honestly and nightmare: when I look back I am surprised I managed it originally.
Using XLRs now just makes more sense. It looks vastly easier to be sure of not shorting wiring. Plus it will make sure the XLR sockets on my TT2 are not open. Added to that, it means I can leave my RCA to RCA (TT2 to amplifier) cables in place. Then I only need switch speaker cables from XLR plug adapters, then over to the back of my amplifier. Depending if I am using and amplifier or not.
The only other option is to look for some very large RCA plugs. Some big enough to ensure that making RCA to speaker socket cables are easy to make.
Lastly though, if you are still reading, you can get some custom cables made by Atlas Cables. I personally think that is the best option. You can pretty much choose which cable to use. Like if you really like one of their cables, like Atlas Mavros. However you will need to check as only most of their cables can be used. Below is the link for their TT2 cable with Hyper 2 cabling.
https://www.atlascables.com/ic-hyper-xlr-zplug.html