This is a rough diagram but hopefully will give you the idea on how to connect the parts up. You will need a polarised latching relay.... since it is only switch a low current for the LEDs it doesn't need to be a large high-current relay, an inexpensive DIL (dual in line) package will be fine and you should be able to source one in the GBP 2 to GBP 5 range. Here's a current eBay listing for a suitable relay (but there are numerous suitable types around).
Panasonic SPDT PCB Mount Latching Relay, 3 A, 12V dc. 5 x OMRON, G5LA-1 DC5, SPDT PCB Mount Non-Latching Relay, 250V 10A, 5V DC Coil. Bridge Rectifier. DS Series - Latching. Capacitance 330 µF. 1 x Omron PCB Mount Non-Latching Relay G5LA1A12DC, Through Hole 12V dc Coil, 10A.
www.ebay.co.uk
The relay will "change" when the impulse from the 5075 goes to the point and will stay on that setting until a different polarity impulse from the 5075 arrives to change the point to its alternative position..
The LEDs can be any size or colour that suits your purpose and the value of the dropping resistor can be determined is the usual way which has been described here numerous times. You will need a suitable power source for the LEDs.
You will need to do a bit of playing around with the polarity of the connection to the relay coil to get the correct LED for your purposes to illuminate for the first installation, but once you have worked it out you can just duplicate for the remaining installations.
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