E30 halo headlights retrofit

Looking to convert my stock 87’ kouki headlights to this set of e30 headlights.

https://www.ebay.com/itm/DOT-APPROVE…QAAMXQbcRQ7SPG

Fabricating and making it look good shouldn’’t be too difficult although I may not be able to close my pop up headlights, which I’’ve already decided is fine (unless there’’s another smaller set I could use.) However I’m not sure what to do with the wiring situation whether I can solder them or if there’’s a harness I can buy? Any info is appreciated