I cant seem to upload pictures from my phone, but I purchased matching plugs for my battery tender at an electronics store, with 10” pigtails. Then I put double spade terminal connectors on them (connects to battery then has another spade on top for your flasher to connect to). Now all of my flashers are plug and play to charge with the tender.
The plugs were $1 each and the spade connectors were 100 for $5 on ebay.