955i Tigger Headlight Relay..... Heeeeelp

yo
my 2006 955i tigger has twin headlights that ain't (ie left bulb provides dip; rh gives main beam.) can anyone tell me how to get the two beams working together ?? pls ??
there's mention of this issue in a 2019 thread - but no fix is suggested.
i bought two changeover relays from ebay which claimed to be a plug n play fix, but no!
i have 4 relays behind the LH indicator 2 under the seat and another on top of the speedo/tacho. i have NO vacant relay sockets.
the current one-bulb system gives a 50mph headlight, at very least both bulbs need to work together
any help GRATEFULLY received
cheers
r

 

thanks so much dave. i'll get right on that link. relays bought on ebay as tigger-specific, plug n play. (!)
thanks

 

more confusion with that link. mentions: one free relay socket in the four-pack under the l/h indicator panel.......... another says that two of the four-pack are vacant. further down (in relation to sprint) there's mention of two empty sockets under the seat.
i have ZILCH empty sockets. sprint info is suggesting two relays under the seat are to do with main / dip beams.
anyone reckon Hinckley might know?