Shoot through the spinner or right orbit to until bonus is maxed and double bonus earned. Now the only thing left is to complete the white standup targets to light the spinner, then spinner all day.
Bonus
Base bonus is advanced by the lit mini buttons on the top, a lit red standup target, the right orbit, the inlanes, and the center saucer. (Max 15K)
Double bonus lights at the right orbit based on the game score's tens digit, collect when lit to activate
Spinner and white standup bank
Complete the white 5-bank standup targets to light the spinner for 1K/spin
These targets also light the Ten - Ace, which are worth 1K each at the center saucer
If you happen to complete the white bank before base bonus is maxed, the spinner is the most lucrative shot and should be the only thing you do.
The center saucer may be decent value when you've collected several cards yet remains draingerous and may be best avoided.