Hello, Billy,
Firstly, may I dispel your notion that Getaway has separate 'kick' and 'score' switches for the slingshots?. It does not; the 'special switch' caper died out during the System 11 era*. High Speed had them, High Speed II doesn't. The right side slingshot has two switches touching the rubber band, these are both 'score' switches in terms of the old method, and are connected in parallel, so each of them should show the same name and number in a switch test, Right Slingshot, No. 32.
As pinballmania says, there's no harm in connecting the switch Column and Row wires together directly for test purposes, without benefit of diode. It wouldn't be done for normal use, but in this case it's okay.
Since the two switches are in parallel, the playfield switch matrix wiring attaches to one of them, and uses jumper wires to connect the other. Looking closely, the switch should have three solder tabs. Two of these are sandwiched in contact with the switch blades themselves, and the third is simply a connecting point or 'dead lug'. The switch Row wire(s), White-red for Row 2, attach to the dead lug, along with the plain end of the diode.
The striped end of the diode connects to the most convenient of the other lugs, with a jumper wire to the other switch. The switch Column wire(s), Green-orange for Column 3, attach to the remaining lug, also with a jumper wire to the other switch. So that either switch closing when a ball touches the rubber band makes a connection between Column 3 and Row 2, via the diode.
* and not before time, many would say