Need schematic for Yukon 77B metal detector

[CASE310350]

Just picked up a 77B, but there are no battery holders, or wires. not sure where they connect. Anyone have a schematic of this?

 

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[vpnavy]

Just picked up a 77B, but there are no battery holders, or wires. not sure where they connect. Anyone have a schematic of this?

I searched

and found Compass Yukon 77B Owner’s Manual (Feb 27, 2019)...