Dixon Kodiak 50 2006 commercial with Honda GXV620 wont start

Starting issue:



Loaded onto trailer after job and got back to shop...went to off load and no cranking power at all.



Battery checks 12v ...both connections nice and clean

Checked with multi meter the 2 handle interlock switches and both good

Brake safety switch good

Seat switch good

Circuit breaker not popped out

Replaced ignition switch and key...nothing

I don't see a fuse anywhere to check

Pos cable to starter is tight

I don't see a solenoid on this model and cant see one on a diagram

just get a few sparks at the starter when grounding out with screwdriver to frame...wont spin

Mounted to frame on the inside to the right just below the gas tank and key switch is an off silver type box with wires....two bolts to frame...I don't know what it is called and cant find a description on a diagram.....looks like it regulates electric current maybe



Anyway...I am at a loss as to what else to test out here. Any advice would be appreciated.



Thanks

Scott