I received a reply from Jon at Borton Volvo. I do have four wires out of the overhead. Here is an excerpt from the bulletin he referenced:

SERVICE MGR SALES MGR GENERAL MGR PARTS MGR

© 1999 VOLVO CARS OF NORTH AMERICA, INC.
GROUP NO
MARKET PAGE
DATE
SUBJECT

35
North America
April 1999
9
1 of 1
Dome Lamp Modifications 700/900
P/N 1342395 / 9126111
On 700/900 series, interior lamp P/N 1342395 supersedes to P/N 9126111 then to P/N 9463068. To install
this part, (P/N 9463068) also add part #ís 967588 housing connector (Qty 1) and P/N 949542 terminals (Qty
4). The terminal housing goes over center circuit board and the terminal positions should be inserted as
shown below:
‡94 model 95 ‡ model
Position (Pin) Position (Pin)
1) brown wire 1) black
2) white & black striped wire 2) white & black striped wire
3) black wire 3) black & brown striped wire
4) green & red striped wire 4) green & red striped wire
NOTE: Diagram Below shows correct position the connector housing over the circuit board so the wires
coming out of the connector housing are facing the rear of the interior lamp assembly. See below illustration
of housing and wire position:


I can't get the diagram to paste to the message but I did upload the diagram under 1994 940 overhead light upgrade.
In summary, the new connector contains all four wires and slides over a circuit board with 4 copper traces.
Sincerely,
Greg