I have a ,98 9510 Deere Combine. It currently has just a deere yield monitor. I have some questions about setting up for mapping. I do not need a mapping screen in cab, just recording for now.

Antenna Receiver: I am running a EZ Guide 250 with EZ Steer / AG15 antennae for guidance. Is there a harness adapter available that will allow me to use that for GPS? Would This work ? 
https://www.ebay.com/itm/Trimble-PN-56993-EZ-Guide-to-John-Deere-Mobile-Processor-Cable/302621745820?epid=1503935681&hash=item4675a9629c:g:Yi8AAOSwRE5acLOd

Mobile Processor? Can I still find an older mobile processor (RE150184) to mount on lower Right side of cab behind seat or is it better to buy a whole different moniter with ISO 2.5 Deere 4/5 moniter and mobile processor. (Part No.PF80426 or similar)

Mobile Processor and Antenna Cables: Is this wired into combine? I have an unused cable rolled up behind cab. (See pic.) or is this something I need to buy? Where would cable be that plugs into mobile processor?

Storage Card, Key Card ? Where is a good place to get these?

Map Reading Software? Do I need to use a Deere Program (Apex) or are there another compatible program? I would like to be able to load gps markers from phone to mark seed change etc.

Is there anything I am missing that I will need to do ?
Pic 1:Yeild Moniter Connector
2: Connector on cable rolled up behind cab 
3 Number on (Terminator?) in harness connecting to YM Display
4: Current Display Front
5 Current Display Info

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IMG_2234[1] (full).JPG (158KB - 193 downloads)

IMG_2233[1] (full).JPG (142KB - 200 downloads)

IMG_2236[1] (full).JPG (159KB - 198 downloads)

IMG_2238[1] (full).JPG (159KB - 204 downloads)

IMG_2239[1] (full).JPG (179KB - 195 downloads)