Engine Temp. Gauge Issues

Having an issue with my engine temp gauge. It is slowly showing temp but close to pegging. Temp is no more than 185-195 using a Lazer thermometer.

Replaced the temp sender twice.

Replaced the guage with a new, old stock gauge and same issue.

Cleaned the connections on the plug block as well.

Assuming it is one of the wires.

Before I started changing I thought I would ask the experts if it may be something that isn't obvious before I start down this path.

Thank you for all suggestions.View attachment 1715771273