1995 volvo 850 won't start. No power reaching starter

I have a 1995 volvo 850 that has sat all winter, I would start it about once a month and let in run for about ten to fifteen minutes and then spring it refuses to start, I turn the key and nothing happens. No click, no engagement of the starter whatsoever.  I put key in run position and used a remote start push button connected to solenoid, starter motor spins but does not engage engine. I can't see anything going bad that quickly, thinking may rodent or wildlife chewed through a wire but can't find which one. Most wire are inside casing or sheathing all exposed show no sign or damage.