Frey climbing area as viewed from Refugio Frey. Torre Principal is the highest visible peak with Torre La Lechuza to its right. To get to Refugios San Martin or Lynch you would go round the right-hand side of Laguna Tonchek seen here and climb up a pretty steep zig-zagging north trending trail, past Laguna Schmoll and up an even steeper route onto the Cordon. Alternatively you can head up the ridge to the side of the hut (based on a map I've seen) - not sure about path conditions or if there is one.