I have a Troy Bilt riding mower with a 42 inch deck. Model 13AD609G063 I replaced the PTO clutch and also bought a relay p/n 725-1648. Can anyone out there tell me where this relay goes? I`ve been all over and under it trying to track it down. No manual shows where its located. I pulled deck to replace PTO clutch and was still unable to locate. Thanks in advance.