The right side joycon should have an IR unit in it that will turn on the switch remotely. At least AUTHENTIC ones do. One option would be to hack a joycon's button by extending it out to a physical button on the cab and have it aimed at the switch inside the cab. This is a theoretical solution, not something that has been done that I am aware of.
EDIT: Also, pro controllers will wake it up by pressing Home+Capture (or just home if latest firmware has been applied), you could hack one of those as well.