Nice addition of puddle lamps, definitely adds an upmarket feel to the car.
Followed your thread for sometime and installed another boot lamp on the left side panel next to the hook.
The existing stock one came with 5W halogen bulbs which were rather dull and dim lit. Would make little to no difference at night. Then I installed Osram LED bulbs but it was just a satisfactory upgrade. Made just a little difference.
Started off by ordering the same boot lamp part from boodmo.
Part number:36210M75JA0. Cost of the part is Rs96 (a lot cheaper than the SGP puddle lamp)
In fact I tried to do such a thing only because of the boodmo free delivery week.

On usual days the delivery cost would be almost half the price of the part.
(The lamp came with halogen bulb, replaced with another LED)

Initially I thought I would solder the wires to the contact points here. Later on close inspection with a multimeter found out that the lamp setup contains a small diode(black) which restricts the polarity of the the terminals to positive and negative only. At the same time I read about a fellow BHPians post on installing an aftermarket horn in his city. He had used spade connectors to solve the connector issue. Thought I could try the same and make a proper connection I could remove if I wanted to someday. Got few spade connectors from an electrical shop, insulated them well and connected it the lamp's terminals. Made sure it was tight and would make no contact with the adjacent terminal.
I used 1sqmm havells wire with approximate length of 2.5Metres from one end to another.
Next, I removed the existing lamp, soldered the two wires on the contact terminals and insulated them well with hot glue(silicon).
Made a hole next to the luggage hook on left side of the boot with a blade and chipped the inner sides until the lamp was a perfect fit.
I routed the wires through the weather strips. I plan to install a proper conduit in the future to avoid any contact of wires to the body.
I have made the connections such that, I could turn off the new lamp manually with the switch while the existing one remains in the ON position. If the stock lamp is turned of by the switch provided there, both the lamps turn off.
The final output at night
With both lamps off:

.
With one stock lamp:
With both lamps on:
The new lamp also has the auto dimming effect similar to the stock one and illuminates the boot very well now
Regards,
advaithraju