Turn arm switch

[TLloyd]

I am helping my 89-year-old father-in-law with his Husqvarna Z25 for Moore. It appears one of the safety switches on the arms is loose. How do I remove, tighten and replace?
Any advice would be appreciated!
This is my first time to have anything to do with a zero turn!
Lloyd

 

[StarTech]

Either you got a IZ25 or A LZ25.

It appears the seat and its mounting bracket has to removed to access the steering arm works.