520h

[Goat 2141 5]

Were doses this hose go 

[WHX?? 48,847]

Thats the the dirty air filter switch hose. It belongs right where it is. The other end should be attached to a small square vacuum switch.

[lynnmor 7,317]

31 minutes ago, WHX20 said:

Thats the the dirty air filter switch hose. It belongs right where it is. The other end should be attached to a small square vacuum switch.

And there is a good chance that the nipple on the switch is broken off.  I have fixed them by sanding the surface flat and adding a new metal plate with a nipple.  Here is a source for a new switch: switch

The photo is generic, ports can be had in a number of configurations.