Here are some pics to help:
The "White" (clear bulbs) are on their own circuit that is operated by a brush ring under the lamp assy.
In this photo, you can see the brush ring as well as the grounding nut/bolt for the bulbs. (Note the white wire coming up through the base plate.) One terminal from each bulb should be connected/grounded here.
This is the brush assay for the clear bulb circuit. The leads should go to the open lugs on the clear bulbs.
The red circuit is powered like the 17, 174, 176 bulbs: the top post is hot with wires going to the open lugs on the red bulbs.
Side note: this is why it used to be a PITA to change a burnt out par36 on any BeaconRay!! Climb on the roof...take the skirt/dome off...DONT SCRATCH THE PAINT!!...unscrew the mount screw & lug screws...insert new bulb...reverse process...!!
Hope this helps!