The DSL looks like this:
val records = kord.updateApplicationRoleConnectionMetadataRecords {
    record(
        type = BooleanEqual,
        key = "member",
        name = "Member of the secret circle",
        description = "Must be a member of the secret circle",
    ) {
        name(Locale.GERMAN, "Mitglied im geheimen Kreis")
        description(Locale.GERMAN, "Muss ein Mitglied im geheimen Kreis sein")
    }
    record(
        type = DateTimeLessThanOrEqual,
        key = "account_age",
        name = "Account age",
        description = "Account must be at least this many days old",
    ) {
        name(Locale.GERMAN, "Account Alter")
        description(Locale.GERMAN, "Der Account muss zumindest so viele Tage alt sein")
    }
}
println(records)

Note that this does not contain the ability to update the application
role connection for a user as it requires an OAuth2 access token which
Kord doesn't support.

see discord/discord-api-docs#5668