Here, try this...
1) Get some "Super Glue".
2) Apply glue to back of both remotes.
3) Stick remotes together.
4) Count to ten for drying time.
5) Remember which "Half" of your NEW remote works which car....

That's what I'd do...
1) Get some "Super Glue".
2) Apply glue to back of both remotes.
3) Stick remotes together.
4) Count to ten for drying time.
5) Remember which "Half" of your NEW remote works which car....
That's what I'd do...