Raffles, a lazy way to protect the connectors is to buy an aerosol 'spray grease' and liberally spray the non waterproof connectors visible above the rad, as a backup, cut some foam to block the gap between the top of the rad & frame to prevent water getting in there in the first place.
My connectors were perfect after 2 winters, when I stripped them and did them properly this year.
An annoying oversight by Suzuki if you know (and do something) about it, a major PITA & design flaw if you don't!!!