As long as the other Kia has the same bolt pattern (it should) you shouldn't have any issues. If the other Kia is a small one then the weight specification might be different for the spare tire, but for short distances - just enough to get the flat tire replaced/fixed - it should be fine. Just keep the speed below the recommended speed.
The rod I got from Amazon (where else?). M8 x 250mm: https://www.amazon.com/gp/product/B07H797JYN/ref=ppx_yo_dt_b_asin_title_o01_s01?ie=UTF8&psc=1
The "handle" also from there: https://www.amazon.com/gp/product/B00MEWFC3C/ref=ppx_yo_dt_b_asin_title_o01_s01?ie=UTF8&psc=1
And the nut: https://www.amazon.com/gp/product/B00IAVJJLC/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
My local hardware stores did not have this, believe it or not. SAE, yes, metric, no. (A 5/16 is close but not exact).
I got the large washer locally. I used Loctite Red to hold the three nuts at their positions on the rod (one at the very bottom, one below the large washer and one above it to keep it from moving up or down). Don't put Loctite on the thread that goes into the vehicle itself because you might want to remove that rod in the future. Make sure it lifts the tire high enough to not put its full weight on the battery ventilation device but too high to keep the floor covering from fitting completely. Also, you'd be surprised how much room there is below the tire once this is done. Enough for some basic tools, wheel chucks, a 12V tire inflator and more, with room to spare.
As for those wires, it seems to be fine. The rod keeps it from moving too far in any direction and even if it did I believe those wires are just for the rear seat heater. Nothing critical.
Good luck! Let me know how it goes. I also recommend the lithium replacement for the 12V accessory battery so you have even more peace of mind. If you end up with two lithium batteries like I did and you want to connect them in parallel, here's the type of cable you'd want: https://www.amazon.com/gp/product/B01F32MR50/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1