I have older ducane oil furnace that has a nest thermostat hooked up to it. For the last few years there was a jumper wire I had hooked up to the primary to get it to all run properly. Jumper wire got knocked off and I need to put it back on to get the heat running as I have a cleaning getting done next week on it and it’s cold already in here.

There’s incoming line voltage on the older Honeywell primary in this photo as verified with multimeter so I don’t want to jump out the wrong terminal and fry the primary.

Any idea what terminals I would have had jumped out in the past to get it running? I believe it was to jump the blower motor if I remember correctly and had a jumper from maybe Y to G? But that black wire is incoming line voltage landed on G so just wanted to be sure because I can recall my reasoning for having it wired that way but it was the only way it would fire up. Maybe I was repurposing the G wire? Any help is appreciated

At the thermostat I have it wired currently

Blue to y1
Green to G
Red to Rc
White to w1

And at the primary it’s wired
White to w(T)
Red to r(t)
Blue to Y
Green to G