Garmin updates

I did some side work installing three Garmins on friends boat along with two black boxes, two lvs32, and transom gt54 also added diy boat brakes. He paid me and I bought 106sv for my bow and LS. I moved the 93sv to console and replaced my helix 5’s. One of my units is 21.10 and the other is 23.10 software versions. If I put a sd card the second slot with latest software can I update both units via the lan network?

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:popcorn, I need to learn how to do this too and on my HBs

Yes......should be 23.10 for both.