I just let that parking lamp connector dangle inside the housing. It's not needed. The light I linked to fits inside the Triumph chrome housing like peanut butter goes with jelly. Any 6024 sealed beam will do, 7" round. Sylvania even makes it in a Silverstar (more bluish), and there is a rebate available.
http://www.amazon.com/gp/product/B000COC...&n=15684181Rebate
http://www.autoaccessories4less.com/sylvania/coupon_rebate.pdf